Since Biden was declared the winner two weeks ago, Trump has launched a barrage of lawsuits and mounted a pressure campaign to prevent states from certifying their vote totals.
So far, attempts to thwart certification have failed in courts in Georgia, Michigan and Arizona.
On Saturday, Matthew Brann, a Republican federal judge nominated by former President Barack Obama, dismissed a similar effort in Pennsylvania, writing that the case amounted to "strained legal arguments without merit and speculative accusations."