HARRISBURG, Pa., Aug. 5 (UPI) -- U.S. Rep. Joe Sestak, D-Pa., officially launched his challenge Tuesday to Sen. Arlen Specter in next year's Democratic primary.

WASHINGTON, July 1 (UPI) -- Two U.S. House Democrats threw down the gauntlet to unseat their counterparts in the U.S. Senate.

WASHINGTON, July 3 (UPI) -- Five congressional candidates are headed to Alaska to show support for opening a wildlife refuge up to oil development, sources said.

WASHINGTON, April 22 (UPI) -- The U.S. Army maintains its policy of mandatory tour extensions despite pledges from the Defense Department last year to stop the practice, records show.

NEW YORK, April 16 (UPI) -- U.S. presidential hopeful Hillary Clinton is to appear on an upcoming edition of "The Colbert Report," Comedy Central announced Wednesday.

WASHINGTON, March 17 (UPI) -- The U.S. presidential contenders, no matter how steadfast their Iraq positions have been, may have to adjust once elected commander in chief, observers say.

WASHINGTON, March 5 (UPI) -- Democrats and their leaders in the U.S. Congress cite the need to strengthen the military as a reason for pulling U.S. troops out of Iraq.

SWARTHMORE, Pa., Aug. 23 (UPI) -- U.S. Rep. Joe Sestak, D-Pa., faced critics at a town hall meeting who expressed frustration that the Democratic Congress has yet to pull U.S. troops from Iraq.

HARRISBURG, Pa., Nov. 7 (UPI) -- Two scandal-tainted Republican congressmen from Pennsylvania, Curt Weldon and Don Sherwood, conceded defeat Tuesday.