[Blitzer:] We're just hours away from what could be the most riveting and revealing day yet of the 2010 midterm elections. There are senate primaries in three states. Two Democratic incumbents and a Republican establishment candidate are in serious danger of losing right now. Will they fall victim to the anti-Washington anger that is clearly out there? Our chief political correspondent Candy Crowley is in Pennsylvania. Our senior congressional correspondent Dana Bash in Arkansas and our national political correspondent Jessica Yellin is in Kentucky. First, Candy, to you. There's new polling that shows it's too close to call in the Democratic race in Pennsylvania right now between the incumbent, former Republican Arlen Specter, and his challenger, Democratic congressman Joe Sestak. Who has the momentum right now? You're on the scene, Candy.
[Candy Crowley, Cnn Senior Political Correspondent:] I can I can probably argue that for both at this point. If you you know it's a different game right now because they are about to go into Election Day. What counts? It counts that your voters show up at the polls. Arlen Specter has the support and the endorsement of a number of big unions here. They are pretty good and they've had a long experience in getting out the votes. Having said that, if you look closely at those polls, there's a huge number of undecideds. At least the last time we looked. And the fact of the matter is, while some of those undecideds really are not going to vote, the undecideds, as you know, tend to go to the person who is not the most well known. So those you would think would be Sestaks votes. So I could argue both ways, but this has been an unpredictable race and I think remains so.
[Blitzer:] Candy, Arlen Specter says he will definitely endorse Sestak if he wins the Democratic nomination. Won't run at as an independent candidate. Throw his support to the Democrats. Sestak sort of hedging on that. What's he saying?
[Crowley:] Well, he doesn't like mentioning the name Arlen Specter. I'll say that. I interviewed both of them yesterday, and Sestak really refused to say, yes, I'll support Arlen Specter, which gave Specter an opening saying, I'm going to answer your questions. And of course I will. I'll do anything to defeat Toomey. At this point, Sestak, who did take a lot of flak for his non-answer, saying, of course, I'm going to, you know I don't want Pat Toomey elected. So slightly different answers but Sestak seemed to understand that it was the wrong answer yesterday and sort of tried to make up for that.
[Blitzer:] All right. We'll watch together with you, Candy, in Pennsylvania. Let's go to Arkansas right now where polling shows Democratic Senator Blanche Lincoln with a 12-point lead over Bill Halter, lieutenant governor of Arkansas but that may not be enough to avoid a runoff. Let's bring in our senior congressional correspondent Dana Bash. She's on the scene for us. Is Blanche Lincoln I assume she's very worried, Dana?
[Dana Bash, Cnn Senior Congressional Correspondent:] She is worried. She told me she doesn't make any assumptions about breaking that 50 percent threshold she needs tomorrow to avoid the runoff, but she is campaigning in this anti-incumbent atmosphere, somebody with experience and seniority in Washington. The fact she's the chairwoman of the Senate agriculture committee. She says that Arkansans can't get her out of that job that they need her in that job and she delivers that message in her delta draw.
[Sen. Blanche Lincoln , Arkansas:] Other people can tell you about what they're going to promise. I can tell what you I've done. And I've worked hard and I've produced. One of the things I've been working on
[Bash:] Why do you think this is such a tough primary for you?
[Lincoln:] Well I think it's multiple reasons. I've run midterm of the administrations before back 1994 when it was our own President Clinton and it was a tough and challenging year. People's expectations elevated. You're the first thing that comes between them and the expectations that haven't quite been met.
[Bash:] Those unmet expectations are feeding into the anti-incumbent mood Senator Lincoln is battling. Whether it's the Wall Street bailout or deficit spending, voters are fed up.
[Unidentified Male:] No disrespect at Miss Blanche Lincoln at this point in time, I think sometimes it's out with the old, in with the new.
[Bash:] You think it's time for new?
[Unidentified Male:] Yes, I believe so.
[Bash:] Do you think that what's happening on the Democratic side in some ways mirrors the tea party on the right and what's happening to you mirrors that? That it's just a wave of anger at Washington, and you're bearing the brunt of it?
[Lincoln:] Well, I think people are concerned. I think you know, people are disappointed in Washington, and I join them in that. I'm disappointed, too. I mean, you know, I do believe in fiscal responsibility and I am a true moderate.
[Bash:] Lincoln is a moderate Democrat. Her positions against public option for health care and against key union priorities have angered liberal and labor groups who have come here from out of state to try to defeat her, but talk to her Democratic opponent, the lieutenant governor Bill Halter and his message, pure populism. When you think of this challenging a primary you think somebody from the left. You're running from the outside?
[Lt. Gov. Bill Halter , Arkansas Senate Candidate:] I'm running from the outside. That's precisely right. Look, this is a time when people want you to stand up for them. Looks what's happened just in the last two years. $700 billion in taxpayer money going in to bail out Wall Street banks. People want change and they know if you send the same people back to Washington, you're guaranteed to get the same results.
[Bash:] Now, the lieutenant governor, her challenger, you just heard, has had big help from outside groups, between $4 million and $5 million spent largely from big labor and she has had the help of the business community as well. If Lincoln does pull off a win either in tomorrow's primary outright or in a runoff in early June, that's just the beginning of her challenge. She still is going to have to have a big fight against her Republican opponent to keep that seat in her hands and away from Republicans in November.
[Blitzer:] All right. Dana will stay in Arkansas for us but let's move to Kentucky right now and the race to replace retiring Republican Senator Jim Bunning. Rand Paul who has support from the tea party is the son of Congressman Ron Paul, has a 12-point lead over the GOP establishment candidate Trey Grayson. Our national political correspondent Jessica Yellin is watching this race for us. It's a battle I guess among conservatives because both were of these men are very conservative, Jessica?
[Jessica Yellin, National Political Correspondent:] It's true, Wolf. And this is really a fight over the direction of the Republican Party. You know, as you say, Rand Paul is a true tea party candidate. He wants to abolish the federal department of education and end the Federal Reserve. Says he'll never vote for any piece of legislation that spends money beyond a balanced budget, and he is so far ahead of his Republican opponent that he didn't mention the man he faces in the polls tomorrow. When he spoke here just a short time ago he talked about the Democrat he plans to face in November, and Wolf I'll tell you he said he is a product of a tidal wave by the tea party that is sweeping the nation.
[Rand Paul , Kentucky Senate Candidate:] Tomorrow's election will be big. It's going to be big for us in Kentucky. It's going to be big nationally. It will be the first victory for a tea party candidate in a state-wide election, and this will have huge ramifications. We the tea party we the people of Kentucky, will help to decide what that message is, where the Republican Party goes, what the Republican Party becomes.
[Yellin:] Now, his opponent, Trey Grayson, was hand-picked by Senate minority leader Mitch McConnell of Kentucky. He has been endorsed by the establishment, including former vice president Dick Cheney, former mayor of New York Rudolph Giuliani. As you say, he is badly trailing in the polls and fighting back these last days stopping short of calling Rand Paul basically a kook. Listen.
[Trey Grayson, Kentucky Senate Candidate:] People are I think, realizing, wait, this is a guy going to press conferences throw spitballs, vote no, make a lot of noise an it's only getting worse, not better.
[Yellin:] Now, he goes on to accuse him of being out of the mainstream, saying he can't win in November, but, Wolf, Rand Paul makes the case that his message of fiscal discipline is just what all voters in this country want right now and the message we've heard here today from supporters is loud and clear, it's all about spending here in Kentucky. Wolf?
[Blitzer:] Jessica Yellin is in Bowling Green, Kentucky for us. Thanks, Jessica. She'll be there tomorrow as well. The first polls by the way close tomorrow at 7:00 p.m. eastern. Join me along with the best political team on television for up to the minute results on these key races. Coverage tomorrow night on these three primaries. An immigration judge issuing a ruling that hits President Obama close to home. Just ahead, the fate of his aunt from Kenya. Can she stay in the United States? And a new blow to the oil industry, a massive fire right now in Texas.