Sen. Dianne Feinstein is facing increasing pressure to resign following her extended illness and absence, with a new poll showing 67% of Californians think she is not fit to serve. If she does step down, who would replace her? Some have suggested thinking outside the box, even floating Oprah Winfrey as an option, according to the Associated Press. NewsNation contributor Johanna Maska joins "The Hill on NewsNation" to discuss possible replacements. #OnTheHill | NewsNation