White House press secretary Jen Psaki on Wednesday blamed a lack of demand for coronavirus testing earlier this year on the lack of supply for tests now as the omicron variant of the virus causes cases to spike nationwide and Americans are traveling for Christmas

The comments come as the White House is under fire for waiting until this week to order 500 million at-home coronavirus tests to send to Americans who request it, meaning the tests will likely not be available until January despite surging demand before the holiday. 

AMERICANS WILL HAVE TO WAIT WEEKS OR LONGER FOR COVID-19 TESTS PROMISED BY THE WHITE HOUSE

A reporter asked Psaki, "Why didn't anyone think [to order the tests] in advance?" 

Employees of Nomi Health check in a long line of people for COVID-19 tests, Tuesday, Dec. 21, 2021, in North Miami, Florida.

Employees of Nomi Health check in a long line of people for COVID-19 tests, Tuesday, Dec. 21, 2021, in North Miami, Florida. (AP Photo/Marta Lavandier)

"I would just go back to the chain of events here to remind people… Before the delta variant was on the rise, there was not a demand for testing in this country. There really wasn't," she said. "We… had to take steps as a federal government to build up the market because the market wasn't there to meet if the demand rose."

COVID CHRISTMAS: OFFICIALS ADVISE MASKS AT HOME, CANCELING GATHERINGS, SHUNNING UNVAXXED

"What the president did with the Defense Production Act is to do exactly that, investing three billion dollars several months go to make sure we were building up the market to make sure we had the capacity," Psaki continued. 

White House press secretary Jen Psaki speaks during a press briefing at the White House, Thursday, Dec. 23, 2021, in Washington.

White House press secretary Jen Psaki speaks during a press briefing at the White House, Thursday, Dec. 23, 2021, in Washington. (AP Photo/Patrick Semansky)

She also said that the Food and Drug Administration authorized five different at-home COVID-19 tests since October, increasing the potential supply. 

But a different reporter confronted Psaki regarding a comment President Biden made in an interview with ABC News' David Muir. Asked about his administration's order for at-home tests, Biden said, "I wish I had thought about ordering and a half a million pills two months ago before COVID hit here." 

Psaki simply repeated her previous answer. 

BIDEN ‘WANTS SCHOOLS TO STAY OPEN,’ PSAKI SAYS AS CLASSROOMS GO REMOTE AGAIN NATIONWIDE

Psaki was also asked by Fox News' Peter Doocy about comments Biden made during the ABC interview in which he said of the delta and omicron COVID-19 variants: "Nobody saw coming. Nobody in the whole world who saw it coming."

Biden delivers remarks from the White House

President Joe Biden told ABC News this week that "nobody in the whole world" saw COVID-19 variants coming, when, in fact, it was widely predicted there would be many of them. (AP Photo/Evan Vucci)

But since nearly the beginning of the pandemic experts were predicting that there would be a proliferation of COVID-19 variants, especially coming from undeveloped countries with low vaccine access. Psaki said Biden meant nobody could have predicted the nature of the variants. 

"Nobody knew that there would be the number of different variants. Nobody knew exactly how transmissible they would be," she said. "We, of course, knew that there would be additional variants at some point coming. We didn't know what they would look like, but we've been preparing for a range of contingencies all along throughout this process." 

CLICK HERE TO GET THE FOX NEWS APP

Also in the Wednesday briefing, Psaki underscored the president's support for a Senate filibuster carve-out for elections legislation, though she said one might not be necessary if Republicans get on board with the Democrat-supported bills currently in Congress – a highly unlikely prospect. 

Fox News' Kristina Biddle contributed to this report.