Congress erupted into testy confrontations and shouting matches on Wednesday as lawmakers grow increasingly frustrated that the federal government remains shut down.

Why it matters: It's not just Republicans and Democrats fighting each other — the tensions are starting to spill over into clashes between lawmakers of the same party. • Speaker Mike Johnson (R-La.) is facing a growing GOP revolt demanding he stop keeping the House out of session and hold votes on appropriations bills and military pay. • Democrats are at odds over a bill to temporarily extend the expiring Affordable Care Act credits that they are trying to make permanent.

Driving the news: Sens. Ruben Gallego (D-Ariz.) and Mark Kelly (D-Ariz.) kicked things off Wednesday by confronting Johnson outside his Capitol Hill of

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