Republican lawmakers in the United States have already flipped enough seats to secure a slim majority in the Senate for 2025, but the outcome for two candidates who received support from crypto-backed political action committees (PACs) and executives has yet to be determined.

Republican control could be a moderating force on Mr Trump. The Senate has welcomed more right-populist Republican members like Mr Moreno in recent years, but still remains a bastion of pre-Trump conservatism. A narrow Republican majority in the Senate could empower moderates to reject Trump nominees outside the political mainstream.

Senate Democrats faced an uphill battle in the 2024 elections, ultimately losing their slim majority in the upper chamber after key seats flipped in Republicans' favor