President Trump may be leaving the White House on Jan. 20, but his legal challenges and refusal to concede could become far more normal in U.S. politics.

Why it matters: GOP support for his tactics has been far broader than immediately after the election.

The big picture: Lawmakers in battleground states are providing pedestals for the airing of baseless legal grievances, AP reports.

• Arizona: The chairperson of the Arizona GOP asked a court to overturn Biden’s win. Republicans held a meeting where Trump's lawyers were permitted to claim the state's vote counts were fraudulent without providing evidence.
• Michigan: Lawmakers allowed Rudy Giuliani to testify at a now-infamous legislative hearing last week. One Republican member of the state's board of election canvassers abstained from certifying the final vote.
• Pennsylvania: 64 lawmakers asked Congress to decline to accept the state's electors.

Candidates are embracing Trumpian tactics, Axios' Ursula Perano reports.

• House candidate Sean Parnell (R-Pa.) has declined to concede in his race against incumbent Rep. Conor Lamb (D-Pa.) and has joined a petition in Commonwealth Court against the Pennsylvania general assembly arguing the state's mail-in ballots were illegitimate, the Pittsburgh Tribune-Review reports.
• GOP gubernatorial candidate Loren Culp in Washington state has refused to concede after the election despite a shellacking from incumbent Gov. Jay Inslee (D).
• Multiple other candidates insisted their losses were the result of widespread fraud. None have provided credible evidence.

The bottom line: Federal election security officials have repeatedly said this election was safe and free of widespread fraud.

Go deeper:The elected Republicans who acknowledge Biden won