AP sources: Obama in TV ad for Coakley

(AP) — Democratic officials tell The Associated Press that President Barack Obama is featured in a new TV ad for endangered Democratic candidate Martha Coakley in Massachusetts.

The ad comes one day before Tuesday's special election, and one day after the president appeared at a rally with the Democrat in Boston. Coakley is in a tight race with Republican Scott Brown, and the White House is pulling out all the stops to try to keep the seat in Democratic hands.

He's also filmed a Web video and taped automated phone calls urging Democrats to turn out to vote for Coakley Tuesday.

Officials disclosed the existence of the ad on the condition of anonymity because it was not yet on the air.