The House passed a second Iran war powers resolution on Thursday following the resumption of hostilities between the U.S. and Iran, with a handful of Republicans who have argued that continued operations violate the War Powers Act again siding with Democrats on the measure.

But hours later, the Senate blocked a separate resolution, also along narrow margins.

Reps. Tom Barrett (R-MI), Brian Fitzpatrick (R-PA), Thomas Massie (R-KY) and Warren Davidson (R-OH) again sided with all House Democrats to pass the resolution by a 214-208 vote.

Rep. Nancy Mace (R-SC) said prior to the vote that she planned to support the war powers resolution but ultimately did not.

The Senate resolution was blocked by a 49-47 vote, with Sen. Susan Collins (R-ME) voting with most Democrats in support of the resolution and Sen. John Fetterman (D-PA) voting against it.

The House and Senate previously passed a similar resolution attempting to end the war, which Democrats have cited to describe the renewed hostilities as illegal.

The measure passed in the House on Thursday was in the form of a concurrent resolution — as was the previous resolution passed by Congress — which is not presented to the president and is generally not seen as carrying the force of law, though Democrats have been working to explore avenues to enforce it.

Also on Thursday, Rep. Greg Meeks (D-NY), the ranking member of the House Foreign Affairs Committee, introduced a resolution demanding that House Speaker Mike Johnson (R-LA) initiate civil action in federal courts to enforce the previously passed war powers resolution directing the removal of U.S. forces from the Iran war.