The General Services Administration on Nov. 23 cleared the way for President-elect Joe Biden to begin the transition process. (Video: The Washington Post)

After weeks of delay, uncertainty and lawsuits, President-elect Joe Biden’s team plunged Tuesday into a formal transition, with Biden aides beginning to meet with agency officials in preparation for a head-snapping Trump-to-Biden shift throughout the vast federal bureaucracy.

Uncertainty remains over how much cooperation the Biden team will get from Trump’s political appointees — some of whom are embracing the false notion that the president could somehow still win reelection — as Biden hopes to rebuild a demoralized federal workforce and prepare it to implement his drastically different agenda.