Unlike the other 49 states and the District of Columbia, Florida did not allow health care providers to preorder the vaccines ahead of the federal government’s June 14 deadline. As a result, no doses will be sent to doctors’ offices in the state during the first wave of vaccine shipments, scheduled to arrive starting on Monday. The second wave of preordered doses, which Florida also missed, is scheduled to arrive about a week later.

“The state of Florida intentionally missed multiple deadlines to order vaccines to protect its youngest kids,” Dr. Ashish K. Jha, the White House’s coronavirus response coordinator, told reporters on Friday.

In a statement, Bryan Griffin, a deputy press secretary for Mr. DeSantis, said characterizing Florida’s policy as a reversal was “patently false.”

“We have always maintained the position that the state of Florida has chosen not to be involved in the preordering or distribution of the vaccine for children under 5,” he said. “The state of Florida does not recommend the vaccine be administered to healthy children,” he added, referring to guidance the state issued in March against the advice of the Centers for Disease Control and Prevention.

State officials had said on Thursday that doctors could order vaccines as needed. But doing so requires using a state portal that was not opened for those orders until Friday.

It was all a lie, the tales of stuffed ballot drop boxes, rigged voting machines, and constitutional “flexibility” that would have allowed Vice President Mike Pence to nullify the 2020 election results and send them back to Republican state legislatures.

The first three hearings of the House Jan. 6 committee have deeply undercut, if not demolished, the postelection myths repeated incessantly by former President Donald J. Trump and his supporters and embraced and amplified by Republicans in Congress.

A parade of Republican witnesses — his attorney general, William P. Barr, his daughter Ivanka Trump, and his own campaign lawyers — knew he had lost the election and told him so. Mr. Trump was informed that the demands he was making of Mr. Pence to block his defeat unilaterally were illegal. Even the most active coup plotter, the conservative lawyer John C. Eastman, conceded before Jan. 6 that his scheme was illegal and unconstitutional, then sought a presidential pardon after it led to mob violence.

Yet the most striking revelation so far may be how deeply Mr. Trump’s disregard for the truth and the rule of law have penetrated into the Republican Party, taking root in the fertile soil of a right-wing electorate stewing in conspiracy theories and well tended by their media of choice. The Republican response to the hearings — a combination of indifference, diversion and doubling down — reflects how central the lie of a stolen election has become to the party’s identity.

In Washington, Republicans in Congress have neither broken with Mr. Trump nor expended much energy trying to rebut the investigation’s findings. And from Nevada’s secretary of state race to the Michigan’s contest for governor, Republican candidates have embraced the fictional conspiracy in their 2022 campaigns.

“I have been fighting for safe, honest and transparent elections since before Jan. 6, and that fight continues,” said Michigan State Representative Steve Carra, whose re-election run has been blessed by Mr. Trump and who said Friday he has watched some but not much of the hearings. “Absentee ballots sent out unsolicited, signature verification relaxed, drop boxes all over the place, especially in Democratic area — it all deserves further scrutiny.”

Like mint in the garden, the seeds that the Trump team planted between Election Day 2020 and Jan. 6, 2021, are now growing out of control, aided by the former president’s allies.