Rep. Mike Haridopolos, a first-term Florida Republican, has quickly moved from freshman lawmaker to a figure drawing attention from House GOP leadership after helping orchestrate the primary defeat of a scandal-plagued colleague in the 2026 midterm cycle.
Haridopolos was among the first Republicans to publicly warn that Rep. Cory Mills, R-Fla., could cost the party a safely red House seat. Mills faced mounting scandals, and Haridopolos said he concluded Mills would lose a general election against a solid Democratic candidate. He took his concerns to House leadership and the White House, urging that Mills step aside.
When Mills declined, Haridopolos told leadership and the president that he would support another candidate in the primary. With help from Rep. Anna Paulina Luna, R-Fla., Mills became one of only four Republican incumbents to lose a primary in the 2026 cycle. Haridopolos recruited former journalist Ryan Elijah to run, and the move was seen with relief by Republican election watchers who felt better about the party's chances against Democratic former NASA official Bale Dalton.
Elijah said Haridopolos was deeply involved in the campaign, attending the primary debate and handling media interviews. Haridopolos described the decision to oppose a colleague as difficult but necessary, framing it as part of a team effort to protect the party's House majority.
That team approach has paid off in his relationships with GOP leaders. House Majority Leader Steve Scalise, R-La., who has known Haridopolos for roughly two decades, called him a trusted ally who delivers and can be counted on. The two first built their relationship in their respective state houses, and Scalise said he told Haridopolos he wanted to be his first campaign check when he ran for Congress.
Despite his junior status, Haridopolos chairs the House Science, Space, and Technology Committee's space subcommittee. The position fits his district, which is home to the Kennedy Space Center. He said space has long been a passion, dating back to his time as a state lawmaker working to bring the shuttle program back to Central Florida.
Haridopolos has pushed for public-private partnerships in space, arguing that the region should not rely solely on NASA. The U.S. has seen a resurgence in space success in recent years, including NASA's completion of the Artemis II mission, which sent four astronauts around the moon and back. Haridopolos said he is confident that within two years the U.S. will land back on the moon.
He also weighed in on federal space spending after the Trump administration initially proposed a roughly 24% cut to NASA's budget in May 2025. Haridopolos said he would seek a constructive conversation with the White House about a higher figure. Ultimately, President Donald Trump signed a spending bill that included $24.4 billion for NASA rather than the initial $18.8 billion proposal, and approved an additional $9.9 billion in the One Big, Beautiful Bill Act.
NASA Administrator Jared Isaacman said Haridopolos understands that much of America's future in space runs through Florida and Kennedy Space Center, describing him as serious about the mission and willing to engage on hard issues.
Before entering politics, Haridopolos was a history professor at what is now Eastern Florida State College. He was born to an American mother and a Greek immigrant father and is married to Stephanie Haridopolos, a physician who has spent recent months as acting surgeon general.