WASHINGTON - The Democrats expanded their majority in the U.S. Senate and House of Representatives, and also defeated the Republicans in elections for seven state governors, according to the latest results. In Tuesday's congressional elections, Democrats captured five more seats to reach 56 in the 100-seat Senate, and won 17 more seats to go up to 252 in the 435-seat House, the networks projected. The Republicans have to face the embarrassment of having just 40 Senate and 173 House seats in the next Congress. The Democrats also claimed an overwhelming victory over the Republicans in the gubernatorial elections for 11 states on Tuesday, as their candidates won in seven states. All this happened on the day that Democratic nominee Barack Obama created history by defeating Republican John McCain in the race for the White House, becoming the first African-American to be elected president of the United States.