Iranian leaders have given the go-ahead to a coalition of terrorists to attack American soil, in effect all but declaring war on the United States.

Manssor Arbabsiar, a naturalized U.S. citizen, pleaded guilty in federal court in New York on Wednesday in a scheme by members of the Iranian government to recruit a Mexican drug cartel to kill Saudi Arabia's ambassador to the United States by bombing a Washington, D.C., restaurant.

Britain's Treasury said Tuesday it had ordered the assets of five men frozen in connection with the alleged Iranian plot to assassinate Saudi Arabia's ambassador to the United States.

The GOP chairman of the House Homeland Security Committee is calling on the Obama administration to expel Iranian diplomats, after U.S. officials said Tehran was behind a plot to murder the Saudi ambassador in Washington.