Bill Clinton recently addressed the question of his chances of moving back into the White House as Hillary has announced her candidacy for the Democratic nomination in the 2016 presidential election.

As a guest on the Late Show with David Letterman on the evening on May 12, Bill laid a bunch of conditions when asked what the "percentage" of the possibility of the White House becoming home again was for him. The former president said that there were plenty qualifiers attached to that, first Hillary would have to win the nomination, then go on to win the election. He then added that if she does win, he will be back a 100 percent but only if he is asked. "I hope I am invited," he said.

He also went on to modestly endorse his wife for president. "It would be a good thing for America if she won, I hope she does," he said.

As Letterman emphasized on how great it would be to get a second run in the White House, Bill spoke about how fortunate the couple had been, and also how having a grandchild had changed his perspective on life and made him more thankful for everything

He also had some simple advice for Hilary as she readies for campaigning. "I urge her to just go out there and have a good time, tell the American people what she wants to do, explain what the challenges are from her point of view and just be grateful, we've had a wonderful life, and I am grateful," he said.

Watch the clip: