Three Republican senators broke with their leadership Wednesday and voted to advance a Democratic-sponsored resolution under the 1973 War Powers Act to halt the conflict with Iran unless Congress formally authorizes further military action.

She joined Sen. Susan Collins (R-ME), who voted for the second time for such an effort, and Sen. Rand Paul (R-KY), who has consistently voted with Democrats on the issue. Nevertheless, the effort still fell short of a majority of the Senate, or of the 60 vote threshold needed for passage, with a final vote of 49 in favor to 50 against.

Senate Republicans on Wednesday again blocked Democratic legislation that would halt President Donald Trump’s war with Iran, but the number of GOP senators voting against the war grew.

GOP Sen. Lisa Murkowski voted with Democrats Wednesday in the latest attempt to limit President Trump's ability to use military force against Iran. The vote failed 50-49. CBS News congressional correspondent Caitlin Huey-Burns reports.

"The War Powers Resolution is pretty clear here. It requires the president to terminate hostilities within 60 days absent congressional authorization."

Moderate Alaska GOP Sen. Lisa Murkowski claimed this week that she and other lawmakers are worried about retaliation for speaking out against some of the Trump administration’s policies. Murkowski (R-Alaska) refrained from calling out President Trump ...

The Senate voted down a bill to end the Iran war. Trump flew to China with a group of CEOs. The Senate confirmed a new Federal Reserve chair. The Trump administration picked a private prison executive to lead ICE.

Ahead of a summit in Beijing, President Trump said he and Chinese President Xi Jinping have almost nothing to talk about when it comes to the war with Iran. CBS News national security analyst Aaron MacLean joins to discuss.