The answer, at least according to Morning Consult Poll, US Senator John Kennedy slightly leads his senior Louisiana counterpart, Bill Cassidy in approval-disapproval polls. Both men are Republicans and neither Senator has served more than three years. Kennedy was recently elected last year, Cassidy in 2014 beating former three-termer US Senator Mary Landrieu, a Democrat, who's political demise was, guess what? Obamacare.
Kennedy’s positives to negatives are 54% to 24% while Cassidy’s comparatives are 51% to 27%. Roughly ¼ to 1/5 of the voters don’t know or have no opinion.
Democratic Senator Bernie Sanders of Vermont has the greatest favorable with 75-21 percent positive to negative differential.
Republican US Senator Jeff flake of Arizona who has opposed President Trump on numerous high-profile issues has earned the worst scores with 37% unfavorable to 45% favorable.