The Massachusetts senator will make his announcement on the Senate floor Wednesday and is taping a video message to e-mail supporters to thank them for their support.
Kerry decided "he could accomplish more for the country in the Senate than as a presidential candidate," the source said. The four-term senator is up for re-election in 2008 and will run for office again, according to a Democratic official who spoke on condition of anonymity.
I'm sure the country is depressed over this news. :)