Amy Gardner for WaPo:

To preserve his hold on power, Trump has spent the weeks since Election Day promoting falsehoods about voting problems in Georgia and five other states, successfully persuading tens of millions of his supporters to believe a lie — that the election was stolen from him, and from them.

Hehas done so by harnessing the power of his position, using his pulpit at the White House and his Twitter feed to let loose a fusillade of conspiracy theories. His assault on the integrity of the election has gotten a hefty assist from pro-Trump media outfits and an assortment of state lawmakers and lawyers who gave oxygen to the debunked allegations — and a majority of congressional Republicans, who called on the Supreme Court to overturn the results in four states.