Rain clouds hang over the US Capitol on September 6, 2022.
CNN  — 

President Joe Biden and his Oval Office predecessor, Donald Trump, are about to wage the most direct showdown yet of their possible rematch as far-right House Republicans drive the nation to the brink of a government shutdown.

Intense activity from Washington to swing-state Michigan during this pivotal week will recall how extremism rocked political institutions during the ex-president’s turbulent term and will test Biden’s capacity to again exploit the chaos to empower his reelection bid.

The government could run out of money at midnight Saturday as House Speaker Kevin McCarthy struggles to control a burn-it-down faction in his majority. The rebels are holding funding hostage to their demands for huge spending cuts that they have no power to force the Democratic-run Senate and White House to accept.

Trump, seeking to sow dysfunction on Biden’s watch and advance his political goals as the GOP front-runner for 2024, is goading his loyalists and called on Republicans in a Truth Social post to shut Washington down “UNLESS YOU GET EVERYTHING.”