The Hillary Clinton campaign has canceled joint appearances with former primary opponent Bernie Sanders after he admitted that "of course" it bothered him that Clinton seemed to be talking down to his supporters in hacked audio from a fundraiser.

The two were set to have joint appearance together Monday. Instead, Sanders will appear in both Iowa and Wisconsin on Monday to boost her candidacy without her.

Clinton is now scheduled to swing through Iowa later in the week, but possibly without Sanders, who was asked on CNN's "State of the Union" if it bothered him that Clinton had referred to his younger supporters as "the children of the great recession" who "live in their parents' basement" to Democratic Party donors.

"Well look, of course it does," said Sanders, but he went on to rationalize it by saying "So we have differences. There's nothing to be surprised about. That's what a campaign is all about."

It was a show of solidarity by Sanders after GOP nominee Donald Trump had made a play for his voters the night before, at a rally in Pennsylvania. Trump interpreted Clinton's remarks to mean that she saw Sanders supporters as "ignorant basement-dwellers," among other things.

The plan had been to show off that progressive solidarity on the campaign trail but now that will have to wait for another day.