An effort by Senate Democrats to force an end to the war in Iran was again blocked by Republicans on Wednesday, the fourth such failed attempt mounted by Senate Democrats since the war began in late February.

The measure failed by a vote of 52-47, with all Democrats except Sen. John Fetterman (D-PA) voting for a procedural motion on the war powers resolution, and all Republicans except Sen. Rand Paul (R-KY) voting against it. Sen. Jim Justice (R-WV) was not present for the vote.

Nevertheless, Democrats intend to continue their efforts. They have nine such resolutions that have been filed, and top Senate Democrats said this week they intend to continue forcing such votes weekly, in the hopes that more Republicans will change their votes as the war drags on.

Some Republicans have begun to express hesitation about the war, and top members of the caucus have said they hope it comes to an end soon. But thus far most have not been willing to openly break with President Donald Trump on the effort.

Separately, Sen. Bernie Sanders (I-VT) plans to call up a vote later on Wednesday on a pair of measures to block sales of bombs and bulldozers to Israel, which Sanders has also framed as referenda on the war in Iran. Twenty-seven Democrats have previously voted for such resolutions, and supporters of the effort expect that number to increase this time.

But at least one lawmaker, Sen. Kirsten Gillibrand (D-NY), who introduced a war powers resolution on Iran this week, for future consideration, said that she views the two issues differently.

“I think of them very differently,” Gillibrand told Jewish Insider during a virtual press conference on Wednesday. “I oppose the war in Iran, but I do not believe we should leave an ally who is being attacked without support,” she said, referring to Israel.