GOP senators are considering whether to throw their support behind a resolution to end hostilities in Iran as a critical deadline approaches.

“If there are military hostilities beyond the 60 days, Congress has to authorize them, or Congress can block them,” Sen. Susan Collins (R-ME) said on Tuesday, according to a NOTUS report. “But Congress has to act.”

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The war in Iran will reach the 60-day mark on Friday. The 1973 War Powers Act forces the president to secure congressional authorization to carry on hostilities, NOTUS reported.

The GOP isn’t on the same page about whether they should use their majority in both chambers to allow Trump to continue the conflict. Collins, the Senate Appropriations Chair, said that she would support a resolution to end the war.

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Sen. John Curtis (R-UT) was also quoted as being uncomfortable with the ongoing war without a congressional vote and said he likewise would side with Collins and support a resolution to stop U.S. military action in Iran.

Democrats have failed to bring five such resolutions, even with the support of Sen. Rand Paul (R-KY), NOTUS noted.

“I am not opposed to a resolution,” Curtis said to NOTUS. “I want to obviously see what’s in it.”

Missouri GOP Sen. Josh Hawley echoed the concern about resuming U.S. military action in Iran without congressional approval.

“Let’s hope that there’s not just stasis, that just nothing happens between now and the end of the month,” he said to NOTUS.