With just a few weeks to go until the midterm elections, President Trump tweeted out a warning for those who might not be able to vote.

"All levels of government and Law Enforcement are watching carefully for VOTER FRAUD, including during EARLY VOTING," he said on Twitter Saturday. "Cheat at your own peril. Violators will be subject to maximum penalties, both civil and criminal!"

[Also read: Democrats hold 9-point edge weeks ahead of 2018 midterm elections: Poll]

Though Trump has pointed to widespread voter fraud in the 2016 elections — claiming millions of illegal votes were cast — a controversial voter fraud panel was disbanded in January.

The panel had failed to find evidence of voter fraud.

Ahead of the 2018 midterm elections, groups in multiple states have alleged that action taken by state officials to close polling places, change voter requirements, and remove registered voters from the rolls have contributed to voter disenfranchisement. Georgia, North Dakota, and Arizona have been among the states under criticism.