Credit: Mark Makela/Getty Images Protesters rally against President-elect Donald Trump Monday outside the Pennsylvania State Capitol Building in Harrisburg before Electoral College members cast their votes for president.

Protesters rallied around the country Monday in a last-ditch effort to prevent President-elect Donald Trump from taking office.

“We will be there to remind them of their Constitutional duty to deliberate, vote their conscience, and stop Donald Trump,” organizers said on a Facebook event page.

"I've never (protested) before. These are dire times." -- Mary Garland, 58, of Phoenixville, Pa. pic.twitter.com/XHOsAiLw3L — Tom Fontaine (@FontainePGH) December 19, 2016

Twelve protesters were arrested for blocking traffic outside the state capitol in Harrisburg, Pennsylvania, ahead of the state’s Electoral College meeting, according to PennLive.

Protester arrested outside #PA's State Capitol in advance of Electoral College ceremony starting at noon. pic.twitter.com/ESPj5bf9hN — Tom Fontaine (@FontainePGH) December 19, 2016

Protesters chain themselves together on North Third Street outside #PA's State Capitol, blocking traffic. pic.twitter.com/WS9vfIgtw0 — Tom Fontaine (@FontainePGH) December 19, 2016

The capitol steps in Harrisburg are hosting a cold protest this morning pic.twitter.com/knuG1ssiOT — Mark Price (@price_laborecon) December 19, 2016

Protesters gathered in other states as well, including Michigan, Virginia, Utah and Texas.

Anti Trump protesters outside of state Capitol in Richmond ahead of electoral college vote. pic.twitter.com/5URJLTaQND — Jeff Goldberg (@abc7jeffg) December 19, 2016

It is 7°F at the state Capitol and these diehards have gathered to protest the Electoral College vote of Donald Trump for president. pic.twitter.com/DD9RFMPKz2 — Chad Livengood (@ChadLivengood) December 19, 2016

A few hours before the Texas electors meet, protesters hold out hope they'll dump Trump. #ElectoralCollege #longshot pic.twitter.com/6DB9ZRwfEO — John C. Moritz (@JohnnieMo) December 19, 2016

Trump would receive 306 Electoral College votes if election results stand. To win, a candidate needs a majority of electoral college votes, or 270.

For weeks, there have been calls for electors to “vote their conscience” and select anyone other than Trump as president, fueled by Democratic presidential candidate Hillary Clinton winning an overwhelming majority of the popular vote and allegations of Russian interference in the election.

A group of celebrities made a video appealing to electors, saying anyone who broke their pledge to vote against Trump would go down in history as an “American hero.” An online petition amassed 4.9 million signatures.

Moore has been one of the most vocal backers of the protests.

“This needs protest, this needs people’s voices,” Moore told MSNBC’s Chris Hayes in an interview this weekend. “Don’t say to yourself, ‘Well, what’s the use? How do we ― nothing’s going to happen.’ You don’t know that. You don’t know that. That’s why we have to keep fighting. We have to fight all the way to Inauguration Day and then be ready for them to start the day after the inauguration passing law after law after law.”

Protesters also gathered and held candlelight vigils in some states Sunday.

They made a heart out of glow sticks. Chanting "Country over party!" #VigilForAmerica pic.twitter.com/MKKImePoCM — Jerod MacDonald-Evoy (@JerodMacEvoy) December 19, 2016

Brave patriots brave below 0 temps - Vigil for America in Madison, WI - cold but worth it #hamiltonelectors #SendItToTheHouse #DraftKasich pic.twitter.com/dADgf7cLKj — Elizabeth Lindquist (@EALindquist) December 19, 2016

One Republican elector, Christopher Suprun of Texas, said earlier this month that he would not vote for Trump. However, no others have joined him publicly, and there’s little reason to believe that enough electors will withhold votes from Trump to change the election results. AP interviews with more than 330 electors found “little appetite for revolt.”