Donald Trump gave a statement on Sunday saying that President Joe Biden should "resign in disgrace" over the withdrawal of U.S. troops from Afghanistan.

On Sunday, the Taliban took over the capital Kabul from the Afgan government, almost ninety days ahead of a deadline created by America to evacuate troops.

The U.S. immediately began evacuating citizens from the country, as Biden has been left stunned by the Taliban's takeover of the country.

"It is time for Joe Biden to resign in disgrace for what he has allowed to happen to Afghanistan," Trump said in the statement, in which he also claims Biden won the presidency via election fraud.

"It shouldn't be a big deal, because he wasn't elected legitimately in the first place," the former president said.

Trump also said the withdrawal of troops was "one of the greatest defeats in American history."

"What Joe Biden has done with Afghanistan is legendary. It will go down as one of the greatest defeats in American history!" he said in the statement.

According to top officials in the U.S., the Taliban's rapid advancement caught them off guard.

"We've seen that that force has been unable to defend the country, and that has happened more quickly than we anticipated," secretary of state Anthony Blinken told CNN, referring to the Afghan military, that has slowly declined in numbers against the Taliban's recruits.

Trump's administration made the decision to withdraw U.S. troops from Afghanistan after a deal was made to withdraw troops by May 2021, in exchange for security guarantees.

However, Biden amended the deadline, changing it to August 31, after 2 decades of war in the region.

On Saturday, Biden defended his decision, and even hit back at Trump for making a deal with the Taliban when he was president, that left them "in the strongest position militarily since 2001."

"When I became President, I faced a choice—follow through on the deal, with a brief extension to get our Forces and our allies' Forces out safely, or ramp up our presence and send more American troops to fight once again in another country's civil conflict," Biden said in the statement.

Both Democrats and Republicans have shared their apprehension over the removal of troops...

"It's a very dire situation when you see the United States Embassy being evacuated. In fact, you just had President Biden a few days ago saying you wouldn't see helicopters evacuating the embassy like Saigon, and yet here we are," said Steve Scalise who is House minority whip and a Republican congressman.

"This is President Biden's Saigon moment and unfortunately it was very predictable," he added, referencing the evacuation of U.S. troops over fifty years ago, at the end of the Vietnam war.