[Camerota:] Time now for the "5 Things to Know for Your New Day." Number one, Homeland Security Secretary Kirstjen Nielsen forced to resign. A senior administration official tells our Jake Tapper that Nielsen believed the situation was becoming untenable and that President Trump has become increasingly unhinged about the border.
[Berman:] Motel 6 will pay $12 million to settling a lawsuit after seven of their locations in Washington state shared personal guest information with Immigrations and Custom Enforcement agents.
[Camerota:] Mick Mulvaney says Democrats will, quote, never see the president's tax returns. The acting White House chief of staff calls the request, quote, a political stunt that does not advance any proper legislative purpose.
[Berman:] An American tourist and her tour guide have been rescued after they were kidnapped by an armed gang last week and they have now arrived at the U.S. embassy in Uganda. It's unclear exactly who the kidnappers are.
[Camerota:] And we have some good news from our CNN family. Yes, wedding bells are in the air. Our Don Lemon and his long-time partner, Tim Malone, have just announced they are engaged. Tim popped the question Friday on Don's birthday and Don said yes. That is going to be a wedding we don't want to miss.
[Berman:] Assuming we get invited.
[Camerota:] Well, I mean
[I -- Berman:] We have a good record on this.
[Camerota:] I feel like because we're saying it on national
[Tv -- Berman:] We'll get invited.
[Camerota:] We will get invited.
[Berman:] All right.
[Camerota:] Because we're begging them on national
[Tv. Berman:] That was basically just a plea
[Camerota:] Yes, pretty much.
[Berman:] To go to a good party.
[Camerota:] Yes.
[Berman:] All right, for more on the "5 Things to Know," go to cnn.comnewday for the very latest.
[Camerota:] OK, Bernie Sanders has his own issue when it comes to releasing tax returns. He said he would but voters are still wondering why he still has not. CNN's Ryan Nobles is live in Des Moines, Iowa, with more. What's the timetable here, Ryan?
[Ryan Nobles, Cnn Correspondent:] Alisyn, we still don't know. Good morning from Des Moines, Iowa, where Bernie Sanders just wrapped up a three-day tour of this state. This time around he comes in as the front-runner. Among the announced candidates, he's leading in most polls. He's raised the most money and he's drawing the biggest crowds. And with that front-runner status comes increased scrutiny and many voters here are asking when will they see those tax returns.
[Nobles:] Bernie Sanders' tax returns are coming, he promises.
[Wolf Blitzer, Cnn Anchor:] So when do you think we'll be able to see your tax returns?
[Sen. Bernie Sanders , Presidential Candidate:] Sooner than later.
[Nobles:] More than a month after telling CNN that he would reveal ten years of his returns, Sanders has yet to deliver, and he hasn't given too many clues as to what's holding up the process.
[Sanders:] Yes, we will. I mean we have it all done and it's just the question of dotting the i's and crossing the t's.
[Nobles:] Sanders claim that he and his wife file their tax returns without the help of an accountant and are still wrapping up their 2018 affairs ahead of the April 15th deadline. He vows that the returns are, quote, boring, leaving many voters, including many of his supporters, to wonder what the holdup is.
[Unidentified Male:] Otherwise delaying, I think he should they should release that, you know, to set an example.
[Nobles:] The delay has become an issue hanging over the Sanders campaign during a time where he is enjoying 2020 front-runner status and would rather be talking about other things, like his push for a war powers resolution related to the situation in Yemen. He brushed aside a question about his taxes in the press conference after the bill's passage.
[Question:] Can you talk about what what is the holdup at this point and when do you
[Sanders:] Actually, we'll have more information on that. Today let's worry about the starving children in Yemen.
[Nobles:] Still, it is impossible to ignore the many times Sanders has chided President Trump for not releasing his taxes.
[Sanders:] Trust me, we do not have investments in Russia or Saudi Arabia or anyplace else.
[Nobles:] Something he had talked about since the 2016 campaign.
[Sanders:] I think the American people need to understand what kind of involvement Trump's business dealings have abroad and what kind of leverage those dealings may have on his policies as president of the United States.
[Nobles:] And something he continues to do even now.
[Sanders:] April 15th is coming. I'm delighted to do that, proud to do that. Hey, Mr. Trump, you do the same thing.
[Nobles:] The Vermont senator's most diehard supporters likely won't leave his side regardless of what his taxes reveal. But even they understand that they still need to be made public.
[Linda Chandler, Iowa City Voter:] Because I think it's important for all politicians to be transparent and for us to see what's going on in their financial world.
[Nobles:] And for those voters still weighing their options, like Derick Albert from the crucial swing state of Michigan, the reluctance of Sanders to reveal the specifics of his personal financial situation makes him concerned.
[Derick Albert, Michigan Voter:] I mean he should definitely release them. Everybody wants to see them. We want to see the president's, too, you know. And the Senate congressional committee that's actually doing the investigating says, hey, Senator Sanders, bring yours, too. America deserves to know.
[Nobles:] And for the first time Sanders took questions from voters here in Iowa during a series of town halls. And we should point out that not one voter asked him when he's going to release his tax returns and said they asked about things like entitlement reform, what he's going to do to affect economic inequality and, of course, health care, meaning this may not be the top priority for voters in Iowa, at least not yet. John.
[Berman:] It is interesting, though, that the senator is taking questions, changing his style a little bit on the campaign trail. Ryan Nobles for us in Des Moines. Thanks so much, Ryan. Senator Kirsten Gillibrand makes her 2020 pitch in a live CNN presidential town hall. She released her taxes already, right?
[Camerota:] Oh, yes.
[Berman:] Yes, she did.
[Camerota:] She released, I think, 12 years of them. She was the first in the entire pool to release her 2018 taxes. So she will be doing a town hall moderated by Erin Burnett tomorrow night at 10:00 Eastern only on CNN. All right, the murder of a college student has exposed the risk of these predators who pretend to be ride share drivers. Two survivors of separate attacks join us to tell us their stories and what they've learned.