The U.S. has been awash in election lawsuits since the spring, when the coronavirus pandemic triggered a raft of disputes over who can vote by mail and how to count their ballots.

Now, legal experts say, a widely expected second wave of lawsuits starting on Election Day will take those fights to the next level. Barring a landslide, such suits could sway the outcome for President Donald Trump or Democratic nominee Joe Biden, both of whom are laying the groundwork for court battles in must-win swing states on Nov. 3.

"My guess is you’re not going to have litigation that is constitutionally as significant as Bush v. Gore in the courts,” said David Boies, the marquee combatant who represented Democrat Al Gore at the Supreme Court, which famously ordered the end of the Florida recount in 2000.