President Donald Trump boards Air Force One at Palm Beach International Airport, Thursday, Dec. 31, 2020, in West Palm Beach,…
President Donald Trump boards Air Force One at Palm Beach International Airport, in West Palm Beach, Fla., Dec. 31, 2020.

After weeks of vowing to win his fight to remain in office, U.S. President Donald Trump issued a video Thursday looking back on what he called "historic victories" and said: "We have to be remembered for what's been done." 

Trump, who has yet to formally concede his November election defeat to Democrat Joe Biden, posted the message on Twitter after returning to Washington early from his Florida resort amid a fight with Congress over a defense bill and coronavirus aid checks. 

Trump praised his administration's accomplishments, which he said included its handling of the coronavirus pandemic and rebuilding the economy. 

Trump, who had COVID-19 in October, frequently played down the severity of the pandemic and oversaw a response many health experts have criticized as disorganized, cavalier and that sometimes ignored the science behind virus transmission. 

Trump said that the United States had produced a COVID-19 vaccine in record time and that he had correctly predicted this would come before the year ended. 

Pedestrians wear protective masks during the coronavirus pandemic in Times Square in New York, Dec. 31, 2020.

The United States is among the countries hardest hit by COVID-19 and leads the world in fatalities, with more than 344,000 deaths officially attributed to the virus, according to the Johns Hopkins Coronavirus Resource Center. 

Trump had been scheduled to attend a New Year's Eve party at his Mar-a-Lago resort. 

The White House has given no reason for his early return to Washington, but it coincided with Trump's fight with Congress over his veto of a major defense bill and his demand for increased COVID-19 stimulus checks, as well as a spike in tensions with Iran. 

Trump ignored shouted questions from reporters about Iran and whether he would attend Biden's January 20 inauguration as he arrived back at the White House. 

Biden was expected see in the new year at his beach house in Delaware, although he was to appear on the ABC special "Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2021." 

Senate Majority Leader Mitch McConnell, the top Republican in the chamber, dealt a likely death blow on Wednesday to Trump's bid to boost coronavirus aid to Americans, declining to schedule a swift vote on a bill to raise relief checks to $2,000 from the $600 included in a $892 billion relief package passed by Congress earlier this month. 

Unsupported claims 

Trump's fellow Republicans in Congress have largely stuck with him through four turbulent years, but he is angry that they have not fully backed his unsupported claims of election fraud or supported him over the stimulus checks and veto. 

He attacked Republican leaders in tweets this week as "pathetic" and accused the party of having a "death wish" if it did not increase stimulus payments for struggling Americans. 

FILE - Senate Majority Leader Mitch McConnell of Kentucky walks to the Senate floor on Capitol Hill in Washington, Dec. 30, 2020.

McConnell on Thursday again rejected a vote on a standalone bill that would increase the stimulus checks, calling it "socialism for rich people" and "a terrible way to get help to families who actually need it." The bill was passed by the Democratic-controlled House of Representatives on Monday. 

McConnell also said there should be nothing controversial about approving the $740 billion National Defense Authorization Act (NDAA), which Trump vetoed because it does not repeal certain legal protections for tech companies. 

"We've enacted an annual NDAA for 59 straight years and counting," McConnell said. "In the next few days – the easy way or the hard way – we're going to do our job once again. This body will fulfill our responsibility to the men and women who protect our country." 

The House voted to overturn Trump's veto on Monday. The Senate will convene again Friday at noon EST (1700 GMT) for a rare New Year's Day session in which lawmakers are expected to cast the first of two procedural votes aimed at overriding the veto. If that succeeds, the Senate is expected to hold a second procedural vote on Saturday followed by a final vote on passage. 

Tensions with Iran 

U.S.-Iran tensions, meanwhile, have again spiked. 

Iranian Foreign Minister Mohammad Javad Zarif on Thursday accused Washington of trying to fabricate a pretext for attacking his country and vowed Tehran would defend itself even though it does not seek war. 

Two U.S. B-52 bombers flew over the Middle East on Wednesday in what U.S. officials said was a message of deterrence to Iran ahead of the first anniversary of a U.S. drone strike that killed top Iranian military leader Qassem Soleimani on January 3, 2020.