Two vulnerable Republicans held onto their seats as a "red wave" election boosted the GOP up and down the ballot.

Republican U.S. Rep. Juan Ciscomani appears headed toward a second term representing Arizona's 6th Congressional District after his Democratic opponent Kirsten Engel conceded on Wednesday, though the AP has yet to call the race.

Juan Ciscomani has maintained his seat in the U.S. House of Representatives, representing Arizona’s Congressional District 6. He narrowly defeated his Democratic opponent Kirsten Engel by 6,867 votes with 99% of precincts reporting,