in the primary, but Halter declined to file as a candidate. Rebekah Kennedy of the Green Party was Pryor's only opposition. Pryor won on election day, with 79.53% of the vote. Kennedy took 20.47%. Colorado On January 15, 2007, incumbent senator Wayne Allard (R) announced he would not seek re-election, honoring his pledge to serve no more than two terms. Former Representative Bob Schaffer of Fort Collins was the Republican nominee. Former Denver Broncos quarterback John Elway was rumored to be considering a run, but declined to do so. Other possible Republican candidates included former Congressman Scott McInnis and Colorado Attorney General John Suthers. The Democratic nominee was 2nd district Congressman Mark Udall of Boulder who announced on January 15, 2007, that he would seek the seat and did not draw significant primary opposition. Other candidates included Bob Kinsey of Denver as the Green Party nominee, Douglas "Dayhorse" Campbell as the American Constitution Party's nominee, and Independent candidate Buddy Moore, unaffiliated any party. On Election Day, Udall defeated Schaffer 53% to 43%. Delaware On August 23, 2008, the Democratic nominee for President, Barack Obama, announced that Biden would be joining him on the ticket as the vice presidential nominee. Delaware law allowed Biden to run for Vice President and senator at the same time, so he would have kept the Senate seat if the presidential ticket had lost. In 1988 and 2000, the Democratic Vice-Presidential nominees Lloyd Bentsen and Joe Lieberman, ran similarly for their seat in Texas and Connecticut, respectively. On November 4, 2008, Barack Obama won the presidential election, making Biden the next VP. Biden vacated his senate seat shortly after the election, allowing for the Governor of Delaware to appoint a successor. There was speculation as to whether the outgoing Governor, Ruth Ann Minner, or the incoming Governor-elect Jack Markell would make the appointment, and if Biden's son, Delaware Attorney General Beau Biden would receive the appointment. On November 24, 2008, Governor Minner appointed Biden's longtime Chief of Staff Ted Kaufman to fill the seat. Kaufman subsequently announced that he would not seek election to a full term in 2010, effectively making him a caretaker. Biden's Republican opponent in the Senate race, conservative political commentator Christine O'Donnell, tried to make an issue of Biden's dual campaigns, claiming that serving his constituents is not important to him. Biden was re-elected with 65% of the vote, or 257,484 votes.