Philly DA warns 'anybody who thinks it's time to play militia' on Election Day: 'F around and find out'

During a press conference on Monday, Krasner highlighted voter protection efforts made by the election task force on the eve of Election Day.

"We are here on a very important day before a very important election. We are here more than anything to speak about protection of an election, making sure that the election that will occur tomorrow will be free. It will be fair, and it will be final," Krasner said.

"I also want to be clear. Anybody who thinks it's time to play militia, F around and find out," Krasner said. "Anybody who thinks it's time to insult, to mistreat, to threaten people, F around and find out."

"So if you're going to try to turn an election into some form of coercion, if you're going to try to bully people, bully votes or voters, you're going to try to erase votes, you're going to try any of that nonsense. We're not playing. F around and find out," Krasner said. 

Krasner said he is hopeful that they won't have any issues, but he also said they do have a concern that there may be people either working in the polls or close to the polls who are going to bring frivolous, bogus challenges to voters.

"This is the bottom line," Krasner said. "Anybody who thinks you're going to play those games in Philadelphia, you're going to do it in bad faith, I've got no problem with doing it in good faith, but if you do it in bad faith, there is an election court, there are judges, they have orders."

Krasner acknowledged that they are all aware of the controversy facing elections in the U.S. and are making sure every vote is counted.

"But this is my nonpartisan hat. We do not care who gets your vote. We care that you get to vote. That is the most important thing," Krasner said. 

The FBI Philadelphia field office said it is also bringing in additional support and adding election command posts. The agency said it will enable each FBI field office across the country to streamline communication and response and ensure the safety and security of the elections and public. 

Pennsylvania is expected to play a crucial role in the outcome of the presidential election, having 19 electoral college votes up for grabs.

"Pennsylvania is the one state that it's hard to see someone losing and then still winning the presidential race," Mark Harris, a Pittsburgh-based longtime Republican national strategist and ad maker, told Fox News. "It's clearly ground zero."

Both Trump and Harris are spending part of their last full day of campaigning in the Keystone State.

Fox News Digital's Paul Steinhauser contributed to this report.