The shooting of conservative activist Charlie Kirk threatens to bring the already hostile relationship between Democrats and Republicans in Congress to a breaking point.

Why it matters: Shouting matches on the House floor, tirades on social media and accusations of complicity in murder — while not new to Congress — rarely occur with such intensity and in such rapid succession. • Some of the most combative, conflict-prone members are promising only to increase the volatility and severity of their attacks on colleagues. • "I'm going to double down on this," Rep. Nancy Mace (R-S.C.) said Thursday. "I'm gonna be louder than I've ever been until this sh*t stops."

Driving the news: Just after a moment of silence for Kirk on the House floor Wednesday, as reports were surfacing that the 31-y

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