A confrontation between Senator John Fetterman and reporters over his hardline support for Israel is fueling a growing split among Democrats, and it's bad news for Fetterman's standing in his own party.

• Fetterman lashed out at a Drop Site News reporter, accusing the outlet of being pro-Hamas instead of answering questions.
• In a separate exchange with Jon Stewart, Fetterman said backing Israel is his one "red line" and he'd leave the party if it turned against Israel.
• Critics say he treats a foreign country as more important than domestic issues facing Pennsylvania voters.
• More Democrats are breaking with Israel: House votes to block weapons to Israel have grown from 9 to over 100.
• Fetterman is deeply unpopular at home, with a 19% approval rating among Pennsylvania Democrats and most wanting someone else.

Outlook: Fetterman faces mounting pressure and a likely tough primary as anti-Israel sentiment keeps rising inside the Democratic Party.