WOODBURY - Newt Gingrich is expected to announce the end of his presidential bid next week. The former House speaker is expected to make a formal announcement on Tuesday. He told disappointed supporters this morning that Mitt Romney is the clear nominee and that the "focus should be on defeating Obama." The news comes after Romney swept five primaries last night in New York, Connecticut, Delaware, Rhode Island and Pennsylvania.Romney sweeps 5 primaries, promises 'better America'GOP Primary Results