On the campaign trail, Senator John McCain has confirmed he will seek the Republican presidential nomination in 2008. McCain made the announcement Wednesday on the Late Show with David Letterman.

David Letterman: “Are you thinking seriously of running? Are you running? Are you going to announce that you’re running?”

Sen. John McCain: “The last time we were on this program, and I’m sure you remember everything very clearly, but you asked me if I would come back on this show if I was going to announce I am announcing that I will be a candidate for president of the United States.”

McCain says he will formally enter the race after he visits Iraq next month.