From the AP:
Nothing personal, Sen. Obama, but our re-election comes first. Barack Obama, for all his attention and primary successes, does not go over so well in a fair number of Democratic lawmakers' home districts. So it seems there is little chance that some will endorse him for president.
Some are counting on Republican votes in their re-election bids. Some are newly minted and in rematches with 2006 opponents. Some may be wary of how their constituents will react to a black presidential candidate. Some, too, have made it a practice of distancing themselves from the national party, fearing the inevitable campaign ad that has their face morphing into Howard Dean, the party chairman, and Obama. ...Rep. Dan Boren, the only congressional Democrat in Oklahoma, calls Obama "the most liberal senator" in Congress and says he has no plans to make a public endorsement...."We're much more conservative" in eastern Oklahoma, Boren said. "I've got to reflect my district." ...Georgia Rep. Jim Marshall, a Democrat and Vietnam veteran who won his last election by about 1,800 votes, said he admires both Obama and Sen. John McCain, R-Ariz., but feels no obligation to state a preference. ..."If it turns out one of them is an ax murderer or something like that I'll make a choice," he joked. Otherwise, "I don't think I need to get involved." ...For most of these fence-sitters—at least 14 as of Wednesday—it boils down to political necessity: They are vulnerable Democrats in conservative-leaning districts who take pains to avoid aligning closely with the national party