Gov. Bill Richardson's phone has been ringing off the hook. Sen. Hillary Clinton called Sunday night. That was followed by a call from former president Bill Clinton, then a call from Pennsylvania Gov. Ed Rendell, who's supporting Clinton. Sen. Barack Obama called twice Monday morning....

...If Richardson is to endorse either Clinton or Obama -- "I might, I might not, how's that for an answer?" -- he said he'll do so by the end of the week.