“Right now, we are focused on the next five weeks of winning the Democratic nomination. If that does not happen, we are going to fight as hard as we can on the floor of the Democratic convention to make sure that we have a progressive platform that the American people will support,” Sanders said on “The Situation Room.” “Then, after that, certainly Secretary Clinton and I can talk and see where we go from there.”

It is impossible for Sanders to win enough pledged delegates in the remaining contests to secure the Democratic nomination, but it remains possible, if unlikely, that Clinton might not win the 2,383 delegates needed for the nomination either, which would set up a potential convention battle in Philadelphia.

“We’re going to be in this until the last ballot is cast,” Sanders said Friday. Clinton’s delegate lead relies in part on the help of more than 500 super delegates — state party officials and other elected Democrats who can vote for whoever they want — who support her.