House Republicans may begin the new year with a one-seat majority, a precarious margin as President-elect Donald Trump plans an active first 100 days.

A tight race in California’s 13th Congressional District, where Rep. John Duarte faces Democrat Adam Gray, could determine whether Republicans hold a one- or two-seat majority.

As of Monday, Gray leads Duarte by 0.1%, with results to be certified by December 5.

Additionally, three Republican lawmakers’ departures will further reduce the GOP’s majority, potentially leaving them with just a 217-215 split.

This slim margin could lead to legislative challenges if a single Republican dissent ties votes, Fox News has reported.

Despite concerns, GOP Whip Tom Emmer downplayed the impact of the narrow majority, emphasizing the ability to deliver with Trump’s support.

Written by B.C. Begley