America is a political crossroads, with Donald Trump hours away from leaving the White House for what could be the final time.

Joe Biden will officially take over as US President about 6am tomorrow, New Zealand time.

Whether Trump stands for President again in 2024 could depend on the outcome of the Senate impeachment trial in the coming weeks.

Matt Terrill, the former chief of staff of prominent Republican Marco Rubio, told Mike Hosking it could also depend on whether Republicans embrace or abandon him and his supporters.

"His supporters find him to be the most authentic truth teller in Washington, yet his detractors believe the exact opposite. It's a very polarising environment."

Trump's expected to spend his final hours in office pardoning up to 100 of his closest allies.

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