Sen. John Fetterman, D-Pa., expressed support on Saturday for the military operation launched by the U.S. and Israel in Iran on Saturday. 

"Operation Epic Fury. President Trump has been willing to do what’s right and necessary to produce real peace in the region. God bless the United States, our great military, and Israel," said Fetterman, who was the only Democrat seen shaking hands with Trump during the State of the Union address on Tuesday night.

Other Democrats, such as Sen. Mark Warner, D-Va., ranking member of the Senate Intelligence Committee, were critical of the Iran operation.

“Iran’s leadership has long supported terrorism across the region, undermined regional stability, continued to advance its nuclear ambitions, and brutally repressed its own people,” Warner wrote in a statement. “But acknowledging those realities does not relieve any president of the responsibility to act within the law, with a clear strategy, and with Congress.

“The American people have seen this playbook before – claims of urgency, misrepresented intelligence, and military action that pulls the United States into regime change and prolonged, costly nation-building” Warner also wrote. “We owe it to our service members, and to every American family, to ensure that we are not repeating the mistakes of the past. The president owes the country clear answers: What is the objective? What is the strategy to prevent escalation? And how does this make Americans safer?”