If you are looking for the solution of Longest-serving U.S. pres. crossword clue then you have come to the correct website. We have shared the answer for Longest-serving U.S. pres. which belongs to Daily Commuter Crossword December 13 2021/ Longest-serving U.S. pres. SOLUTION:FDR Solve more clues of Daily Commuter Crossword December 13 2021.