Progressives demanded unified opposition before President Trump announced U.S. strikes against Tehran's nuclear program, but Democratic Party leaders were treading more cautiously.

Iran lashed out at the US for crossing “a very big red line” with its risky decision to launch strikes on three Iranian nuclear sites.

The United States attacked three sites in Iran early Sunday, inserting itself into Israel’s war aimed at destroying the Iranian nuclear program in a risky gambit to weaken a longtime foe that prompted fears of a wider regional conflict as Tehran accused Washington of launching "a dangerous war.