Senate Democrats hold off on new Iran vote - for now

By Patricia Zengerle WASHINGTON (Reuters) - Several Democratic senators said on Tuesday they would give the Obama administration at least two more months to reach a nuclear deal with Iran before voting for tighter economic restrictions, easing the threat that Congress might override President Barack Obama's veto of a new sanctions bill. U.S. Senator Robert Menendez, co-author of the legislation that would tighten sanctions on Iran if there is no deal by the end of June, said he and other De