Democrat Robin Kelly has won her race to replace former Rep. Jesse Jackson Jr. (D-Ill.).

Kelly coasted to victory in the general election on Tuesday, winning approximately 80 percent of the vote in the heavily Democratic Chicago district. The Associated Press has called the race.

The former Cook County administrator's real victory was in the Democratic primary, where she attacked former Rep. Debbie Halvorson (D-Ill.) over Halvorson's opposition to gun control and received the backing of a number of national groups. New York City Mayor Michael Bloomberg's (I) gun-control super-PAC spent more than $2 million on Kelly's behalf in that race, which Kelly won by a wide margin.

Kelly's win gives Democrats 201 seats in the House, 17 short of a majority.

In her victory speech, Kelly again pledged to fight for increased gun control. The South Side Chicago district has been particularly hit by gang violence.

"Now, make no mistake, the road ahead will be bumpy. Making our families safe from gun violence is going to be a challenge. Putting people back to work is a tough task," Kelly said. "But, to those who say that we won't be able to make Congress do anything on gun control, who think this Tea Party Congress can't be beaten, I've got two words: Watch us.

--This report was updated at 9:09 p.m.