Actually, the President has done nothing of the sort. He has said that the spying covered US persons (citizens and/or legal residents) communicating with foreigners oversees.
In fact both Harry Reid and Nancy Pelosi have stated,
Those two are supposed to reassure me? My opposition to this is based on US law and the Constitution, not on what some loony left botox queen from San Francisco tells me.
I have read the text of the President's radio address, Sunday speech and his press conference and nowhere does he state anything of the sort. Please show me where the President has said this program was used against U.S. Citizens or any Permanant residents under the guise of 50 USC 1801 or 1802.