The agency used a no-bid contract to buy 10 used jets, saying they were urgently needed for deportation flights. But the fleet has largely sat idle for months.
Some Democrats said the outcome showed that the moderate wing of the party carried more electoral weight, while Ms. Hong's strong showing gave some progressives hope.
The agent, Adam Saracco, was charged with misdemeanor after the altercation at a gas station near Chicago last year during the Trump administration's crackdown there.
Darline Graham and Ralph Norman emerged from a special election sprint on Tuesday to succeed Lindsey Graham. She will sell her closeness to President Trump. He will tout his conservatism.
The charges signaled an escalation of the Justice Department's prosecution of the Southern Poverty Law Center, which is best known for investigating white supremacist groups.
The Trump administration will not enforce reporting requirements of the 2021 Corporate Transparency Act, which was intended to crack down on money laundering.
The lawsuit filed in federal court said President Trump "stands to gain financially by giving 'market-moving' government information to those who are willing and able to pay his personal company."