WASHINGTON (AP) -- President Bush plans a visit next week to Fort Polk, home to a regiment due to return soon from a year of service in Iraq. Bush will speak to military personnel at the base on Tuesday, White House spokesman Scott McClellan said Friday. The 4,000-strong 2nd Armored Cavalry Regiment, in Iraq since last March, is due to return sometime in March or April. It is to be replaced by a brigade from the 1st Cavalry Division in Fort Hood, Texas, as part of a larger troop rotation announced earlier by the Pentagon. The 2nd Armored, the oldest...