Besieged by multiplying scandals and salacious accusations, Representative Madison Cawthorn, Republican of North Carolina 

Mr. Cawthorn, who entered Congress as a rising star of the party’s far right, has been accused of falsely suggesting that his Republican colleagues routinely throw cocaine-fueled orgies 

insider trading and an inappropriate relationship with a male aide. This week, he was detained at an airport, where police said he tried to bring a loaded handgun onto an airplane 

That came just days after pictures surfaced of him wearing women’s lingerie as part of a cruise ship game, 

imagery that might not go over well in the conservative stretches of his Western North Carolina district. And last month he was charged with driving with a revoked license for the second time since 2017.

A political group supporting Senator Thom Tillis, Republican of North Carolina, has been pouring money into an ad campaign accusing Mr. Cawthorn of being a fame-seeking liar. 

The group is supporting the campaign of a more mainstream Republican, State Senator Chuck Edwards, who is running against Mr. Cawthorn. 

After initially blaming Democrats for the onslaught, Mr. Cawthorn on Friday said it was Republicans who were targeting him because he threatens the status quo.