According to Arizona Governor Doug Ducey's office, "According to Arizona state law, the governor will have to call a special election to fill the seat because Franks' resignation comes more than six months before the next general election".
One Arizona Republican reportedly said not many people would be "surprised" if he resigned. Al Franken announced that he would be resigning "in the coming weeks" after several women alleged the 66-year-old had behaved aggressively and inappropriately toward them.
Conyers denied the allegations, while Franken said some of the accusations against him were untrue and he remembered other incidents differently from his accusers.
Franks drew a sharp response from Democrats during a 2013 House committee debate when he said "the incidence of rape resulting in pregnancy are very low".
It was not immediately clear why Franks was resigning.
There is no word on who could replace Franks at this time.
Franks was spotted on the House floor during votes Thursday night, speaking with fellow Arizona Republicans Andy Biggs and David Schweikert.