A federal judge in Pennsylvania has rejected a lawsuit brought by the Trump campaign in Pennsylvania seeking to overturn the state's election results. In doing so, the judge offered a harsh rebuke to the Trump legal team for filing a suit without "factual proof."

U.S. District Court Judge Matthew Brann wrote in the opinion that he would not "disenfranchise almost seven million voters," as the Trump campaign had sought.

"One might expect that when seeking such a startling outcome, a plaintiff would come formidably armed with compelling legal arguments and factual proof of rampant corruption," Brann wrote. "That has not happened."

Click here to read more about the failed legal effort, the latest in more than a dozen the Trump campaign has filed seeking to overturn results of the 2020 election.

-ABC News' Alex Hosenball and Matt Mosk

While exiting evening Mass at St. Ann's Catholic Church in Wilmington, Delaware, on Saturday, Biden responded to a shouted question from a member of the press pool by saying that all Americans should be able to attend religious service "safely" during the ongoing pandemic. 

"Mr. Biden, should all Americans, sir, be able to attend religious services during the pandemic?" a reporter asked Biden.

"Yes, safely," the president-elect responded. 

Biden did not respond to a follow-up question on whether that means all Americans should be able to attend indoor religious services like he is able to. 

The president-elect has consistently attended indoor church services near his Delaware home since the summer, usually with family and always wearing a mask.

However, it may become more difficult to do so when Gov. John Carney's new coronavirus restrictions take effect on Monday. They will limit indoor gatherings outside of the home to 30% of a venue's capacity and no more than 50 people. Gatherings inside the home will be limited to no more than 10 people, and outdoor gatherings are capped at 50 people but can be expanded to as many as 250 people with approval from the public health department.

-ABC News’ John Verhovek

As President Trump continues to refuse to concede the election, ABC News Chief Anchor George Stephanopoulos will go one-on-one exclusively with President-elect Biden’s chief of staff Ron Klain to discuss the Biden team’s transition and the coronavirus pandemic. 

Plus, Stephanopoulos will interview Dr. Moncef Slaoui, the chief science adviser to Operation Warp speed, the federal government's coronavirus vaccine program.

And former New Jersey Governor Chris Christie, former Chicago Mayor Rahm Emanuel, Democratic Strategist Karen Finney and The Dispatch Staff Writer Sarah Isgur join the Powerhouse Roundtable to weigh in on Trump’s latest election gambits.

-ABC News’ Adia Robinson

As Trump serves out his last few months as president and Biden focuses on the raging coronavirus pandemic during his transition, Trump appeared to have skipped a side-event at Saturday's virtual G20 summit on “Pandemic Preparedness and Response.”  

During the time the event was scheduled on the G20 agenda, Trump was at his Virginia golf course. He has since returned to the White House.

French President Emanuel Macron and German Chancellor Angela Merkel were among the speakers at the event. 

Trump’s brief participation in the virtual summit Saturday appears to have been more-or-less limited to the opening remarks. At times during the Zoom style video recording, the president could be seen looking down at something in front of him.

Meanwhile, despite Trump's roadblocks and his administration refusing to recognize Biden as the president-elect -- including not giving him access to pandemic-related information -- Biden is forging ahead and was meeting with transition advisers on Saturday as he prepares to announce key Cabinet positions.

The White House has yet to release a readout of Trump's participation in the summit, but White House Press Secretary Kayleigh McEnany said the president addressed the pandemic in his remarks to world leaders. According to her statement, the president stressed the economic components of the pandemic but also talked about advances in treatments and toward a vaccine.

-ABC News’ Jordyn Phelps