Other causes of nausea include side effects from medications, pain, pregnancy and morning sickness, seasickness, viral infection, alcohol toxicity, and disease of the brain, esophagus, stomach, gallbladder, liver, pancreas, and intestine.
so roosevelt was able to win more than two terms because there was not yet a formal term limit on the presidency and the unique conditions when he ran for his third and fourth terms made his arguments for breaking with tradition acceptable to a majority of american voters
William Henry Harrison spent the shortest time in office with 32 days in 1841. Franklin D. Roosevelt spent the longest with over twelve years, but died shortly into his fourth term in 1945; he is the only president to have served more than two terms. A constitutional amendment, affecting presidents after Harry Truman, was passed to limit the number of times an individual can be elected president.