PHOENIX - Sen. Jeff Flake took to Twitter again Sunday to criticize Republican support for Alabama U.S. Senate nominee Roy Moore amid sexual misconduct allegations.

The tweet urged Republican voters in Alabama to vote beyond party lines, calling continued support for Moore over Democratic candidate Doug Jones "political tribalism at its worst."

In an interview with The Washington Post, four women accused Moore of making sexual advances toward them when they were teenagers and Moore was in his early 30s. One of the women said she was 14 years old when Moore initiated sexual contact.

More women have since come forward alleging sexual assault. Moore has vehemently denied the accusations, calling them a "witch hunt," according to The Washington Post.

Earlier this month, Flake called on Moore to step aside immediately in light of the accusations.

Flake has recently been an outspoken critic of the Republican party. The Arizona senator was caught on an open microphone saying that the GOP is "toast" if it follows Moore and President Donald Trump.

Flake, who has announced that he will not seek re-election, has also said that he would "no doubt" vote for Democrat Doug Jones over Moore in the Alabama Senate race, according to The Washington Examiner.