The Trump campaign’s attempt to block President-elect Joe Biden from being declared winner in Pennsylvania has been rejected by a federal appeals court.

The panel of three judges deemed the case was without merit, saying the Trump campaign had not made specific allegations or provided proof.

The ruling is another major setback for Donald Trump in his attempts to overturn the November 3 election.

On November 26, President Trump said he would give way if Joe Biden was declared the winner.

However, on the next day he again made unfounded allegations of “massive voter fraud”, tweeting: “Biden can only enter the White House as President if he can prove that his ridiculous ‘80,000,000 votes’ were not fraudulently or illegally obtained.”

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The 3rd Circuit Court of Appeals had been asked to consider a lower court’s decision to dismiss the Trump campaign’s attempts to invalidate millions of mail-in votes in Pennsylvania.

The lower court ruling had paved the way for the battleground state to certify Joe Biden’s win, giving him 20 vital Electoral College votes and effectively the presidency.

In giving the appeal court’s opinion, Judge Stephanos Bibas wrote: “Free, fair elections are the lifeblood of our democracy. Charges of unfairness are serious. But calling an election unfair does not make it so.”

“Charges require specific allegations and then proof. We have neither here,” wrote Judge Bibas, who was nominated by President Trump.

Following the ruling, Trump campaign lawyer Jenna Ellis wrote: “On to SCOTUS!”

The Trump campaign has filed a slew of lawsuits alleging voter fraud in several states, but with little success.

Joe Biden is projected to defeat President Trump 306 to 232 in the US electoral college, which determines who becomes president – far above the 270 he needs to win.

Time is running out as states have until December 8 to resolve election disputes before the Electoral College meets on December 14 to formally declare the victor.

Donald Trump’s refusal to concede has upended the process that normally follows a US election.

However, it is not a requirement for Donald Trump to concede in order for Joe Biden to be sworn in as the 46th US president.