The Senate delivered a sharp rebuke to President Trump on war powers, voting to restrict his authority to maintain military forces in Iran. Four Republicans broke ranks to join Democrats in passing the nonbinding resolution, marking an unusual bipartisan challenge to executive authority.

This vote comes just a week after Trump signed a memorandum of understanding with Tehran, suggesting tensions over the administration's approach to Iranian conflict. The resolution would require Trump to remove U.S. armed forces unless Congress explicitly authorizes their presence, except when defending against imminent attacks.

The tech selloff accelerated alongside these political developments, though the connection remains unclear. Meanwhile, Trump's voter eligibility push faces resistance from a newly defiant Republican Senate caucus.

This represents the first time both chambers have passed identical war powers restrictions targeting Trump's Iran policy, signaling potential legislative gridlock ahead of the 2020 election.