Because he'd hurt her, or because she'd hurt him?

The Democratic party's effective control of the U.S. Senate is at risk in the upcoming Massachusetts special election to fill the late Ted Kennedy's seat.

Yet, Obama's not going to campaign for the Democrat.

President Obama has no plans to travel to Massachusetts to campaign for Democrat Martha Coakley in the home stretch in the special election to fill the US Senate seat held by the late Edward M. Kennedy.

Presidential press secretary Robert Gibbs said today in response to a question at a briefing in the White House that the "president doesn't have any travel plans to campaign in Massachusetts," because "it's not on our schedule to go to next week."

Coakley represents the critical 60th vote that Democrats need to pass the president's health care overhaul. Coakley's opponents -- Republican Scott Brown and independent Joseph L. Kennedy -- have both said they would vote to block the health care bill.

http://www.boston.com/news/local/breaking_news/2010/01/obama_has_no_pl.html

Is Obama afraid that his unpopularity would hurt Coakley's chances?

Or, is Obama afraid that Coakley's loss would negatively reflect on him?