The 74-year-old made the remarks at the Conservative Political Action Conference (CPAC) in Florida yesterday (Sunday 28 February), where he made his first speech since leaving office.
He said: "Joe Biden has had the most disastrous first month of any president in modern history. It's true.
"Already the Biden administration has proven that they are anti-jobs, anti-family, anti-borders, anti-energy, anti-women and anti-science."
He continued: "We all knew that the Biden administration was going to be bad but none of us even imagined how just how bad they would be and how far left they would go."
"America first to America last," he added.
He also repeated the unsubstantiated electoral fraud claims he has been making since his election loss in November, and hinted at another presidential run in 2024.
He said: "Actually you know they just lost the White House. But who knows - who knows? I may even decide to beat them for a third time, OK?"
If he does run again, Trump made it clear it wouldn't be in a new party - as some reports have suggested.
He said: "We're not starting new parties. You know, they kept saying 'he's going to start a brand new party'. We have the Republican Party, it's going to unite and be stronger than ever before.
"I am not starting a new party."
Trump was acquitted in his second impeachment trial a couple of weeks ago.
The final vote was 57-43, meaning that the Senate fell 10 votes short of convicting the former president of inciting the insurrection at the Capitol, which resulted in five deaths.
Every Democrat voted in favour of convicting Trump while seven Republicans joined them, but it wasn't enough to reach the two-thirds majority required to find him guilty.
It means Trump can run for the presidency again, if he wishes.
During the trial, Trump's lawyer, Michael Van der Veen, said evidence had been 'fabricated'.
He said: "In short, this impeachment has been a complete charade from beginning to end.
"The entire spectacle has been nothing but the unhinge pursuit of a long-standing political vendetta against Mr Trump by the opposition party."
The former president's Facebook and Twitter accounts were suspended in the wake of the Capitol riots and he remains banned from the platforms.Featured Image Credit: PA