Independent Vermont senator and proud socialist Bernie Sanders will decide by March 2015 whether he makes a run for the White House.

In an interview published Friday with the Associated Press, Sanders says he will only run if he knows he has a shot at winning.

“I don’t want to do it unless I can do it well,” he said. “I don’t want to do it unless we can win this thing.”

The Vermont senator said that it would be a “gut decision” and he is still not sure whether he would run as an independent or mount a left-wing challenge against likely candidate Hillary Clinton in the Democratic primary.