A tense exchange over whether backing Israel should decide who counts as a Democrat put Fetterman on the defensive, and it lands badly for him.

• Fetterman said he would reject candidates who share his economic goals if they break with him on Israel.
• Stewart pushed back that Israel is a foreign country and a strange line to draw inside an American party.
• Fetterman told DSA-aligned Democrats like AOC, Bernie Sanders and Mamdani to run under their own banner, though the US has only two real parties.
• Pressed on it, he tied criticism of Israel to danger for Jewish Americans, and Stewart replied that Israel and the Jewish community are not the same thing.
• Polling cuts against him: most Jewish Americans oppose the current Israeli government, and his approval among Pennsylvania Democrats sits near 19% with most saying they want someone else.

Outlook: Fetterman looks headed for a brutal primary fight, with his own party's voters already looking for a replacement.