As Sen. Bernie Sanders (I-VT) is expected to endorse his primary competitor, presumptive Democratic nominee Hillary Clinton, on Tuesday morning, presumptive Republican nominee Donald Trump took to Twitter, saying Sanders “sold out to Crooked Hillary Clinton.”

Bernie Sanders, who has lost most of his leverage, has totally sold out to Crooked Hillary Clinton. He will endorse her today – fans angry! — Donald J. Trump (@realDonaldTrump) July 12, 2016

I am somewhat surprised that Bernie Sanders was not true to himself and his supporters. They are not happy that he is selling out! — Donald J. Trump (@realDonaldTrump) July 12, 2016

The Trump campaign also sent out a press release listing five reasons Sanders supporters “will never be excited about Hillary Clinton:

Sanders: Clinton has backed “virtually every trade agreement that has cost the workers of this country millions of jobs” Sanders: Clinton is in the pocket of Wall Street Sanders: Hillary Clinton = D.C. Establishment Sanders: Democrat Establishment immigration policies would drive down Americans’ wages, create open borders Sanders: Clinton supports nation-building in Middle East through war and invasion

Sanders is expected to endorse Clinton in New Hampshire at 11 a.m. on Tuesday.