Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE took aim at Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE supporters Sunday for what he described as threatening behavior.

"If my many supporters acted and threatened people like those who lost the election are doing, they would be scorned & called terrible names!" the president-elect tweeted Sunday.

If my many supporters acted and threatened people like those who lost the election are doing, they would be scorned & called terrible names! — Donald J. Trump (@realDonaldTrump) December 18, 2016

While Trump did not elaborate, his Sunday evening tweet could be referring to a small movement that is pushing electors to vote against him when they meet Monday.

ADVERTISEMENT It could also be related to the secret CIA assessment reported earlier this month that Russia intervened in the presidential election to help Trump win the presidency.