Bernie Sanders stopped short of formally conceding the Democratic primary in a web address to supporters on Thursday night, but did say he would start helping presumptive Democratic nominee Hillary Clinton take on Donald Trump in the coming weeks.

‪”The major political task that we face in the next five months is to make certain that Donald Trump is defeated and defeated badly. And I personally intend to begin my role in that process in a very short period of time,” Sanders said from Burlington, Vt.