APNewsBreak: AP sources: Obama to Massachusetts

(AP) — Democratic sources tell the Associated Press that President Barack Obama intends to travel to Massachusetts before Tuesday to campaign for the endangered Democratic candidate in a Senate special election.

The sources spoke on the condition of anonymity because they were not authorized to pre-empt a White House announcement. The timing of the visit is uncertain.

A poll is showing a shift in favor of the Republican Party in the race to fill a Senate seat that Democrats have held for more than half a century. Sen. Edward M. Kennedy died of brain cancer last August.