WASHINGTON -- Congress could be receptive to President Barack Obama's pledge to end a 16-year-old policy banning gay people from serving openly in the military, a top Democratic lawmaker said. The Pentagon also signaled openness to a change.

Speaking at a human-rights dinner in Washington Saturday, Mr. Obama pledged to end the "don't ask, don't tell" policy, which allows homosexuals to serve in the military as long as they don't disclose their sexual orientation or act on it. The president, who made a similar pledge during...