Case, a moderate Democrat, served in the U.S. House from 2002 to 2007.
He says he’ll bring a calm, level-headed stance to Capitol Hill.
He’s filling a seat vacated by U.S. Rep. Colleen Hanabusa, who made an unsuccessful bid for governor in the primary election.
In the general election, Case faced a challenge from Republican Cam Cavasso, a staunch supporter of President Trump.
Cavasso argued it’s time Hawaii’s congressional delegation include a Republican voice.
Also running for the seat: Green Party candidate Zachary Burd.
Meanwhile, incumbents U.S. Sen. Mazie Hirono and U.S. Rep. Tulsi Gabbard also won re-election Tuesday, enjoying commanding leads early in the night.
Hirono’s Republican challenger, Ron Curtis, was a political newcomer who describes himself as a common sense moderate.
Facing off against Gabbard was Republican Brian Evans. He said his reason for running is simple: “If you do nothing, then that’s what happens.”
Gabbard said Tuesday night that she’s thankful for all those who continue to support her.
“This is when we come together and begin to tackle the problems that we’re facing,” Gabbard said.
“This is where the rubber meets the road. No matter what happens, we look first and foremost to how we can deliver solutions to the people of our communities here in Hawaii.”