Not quite the same as 31/2 years of blatant lies, encouraging an assault on the Capitol, false accusations of stuffing ballot boxes and false accusations of 'fixing' voting machines.
U.S. Democrats have challenged presidential election results in the past.
In the 2000 election between Democrat Al Gore and Republican George W. Bush. The election results in Florida were so close that it triggered a mandatory recount. The situation eventually led to a legal battle that reached the U.S. Supreme Court in the case *Bush v. Gore*. The Court's decision effectively ended the recount, giving Bush the victory. Gore accepted the ruling, though many Democrats were dissatisfied with the outcome.
Another example occurred after the 2004 election, where some Democrats in Congress challenged the results in Ohio, alleging voting irregularities. This challenge did not alter the outcome, as it was rejected by both the House and the Senate.
In 2016, some Democrats also raised concerns about potential interference in the election and considered challenging the results, but no formal challenge was pursued in Congress.