A group of lawmakers spanning a broad ideological spectrum is raising alarms about the possibility of the United States taking an active role in the conflict between Israel and Iran.

Defense Secretary Pete Hegseth said the U.S. is 'postured defensively' as more warplanes and a massive aircraft carrier moved to the region.

Hezbollah, Iran’s most powerful regional ally, has signaled privately that it does not intend to attack Israel, but Lebanon’s military has bolstered its presence in the country’s south to prevent rocket fire.

The conflict between Israel and Iran has forced many countries in the Middle East to close their airspace, as Israeli jets and Iranian exploding drones and missiles fly over their night skies.

Israel and Iran have attacked each other for a fifth straight day on Tuesday with President Donald Trump urging Iranians to evacuate Tehran. Since the Israeli strikes on Friday, the two Middle Eastern rivals have exchanged blows, with Iranian officials reporting more than 220 deaths, mostly civilians, while Israel said 24 civilians had been killed.

Israel’s military campaign reminds some of America’s ill-fated Middle East interventions, which President Trump has long denounced.

Blasts rang out across a swath of the Middle Eastern republic’s territory, targeting Iran’s nuclear capabilities, military leadership and scientists.

An Israeli official said that "there's never a 100 percent guarantee," but "a nuclear disaster" should "not happen."

Bill O'Reilly told NewsNation's Leland Vittert Monday night about a brief phone call he had with President Trump. BILL O'REILLY: Earlier today, very briefly, I texted with President Trump. He doesn't want to use American air power at this point,