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
franklin roosevelt was elected not to three terms but to four terms as president he died a few months into his fourth term in 1945 and was succeeded by his vice president harry truman roosevelt was able to be elected this many times because there was no term limit on the presidency at that time