President Trump is under pressure to significantly improve upon the Obama-era deal in order to justify the huge human and economic cost of taking the United States to war.
President Trump campaigned against the Obama-era deal as far back as 2015, and ultimately killed it during his first term over the objections of many of his top national security aides.
Four G.O.P. senators crossed party lines to back the resolution to direct President Trump to halt the war in Iran and seek authorization from Congress, but their support was not enough.
The vote on Tuesday reflected a determination among Democrats to continue aggressively pushing back on President Trump’s handling of the war with Iran.