President Harrison died just one month after taking office, and Tyler became the first vice president to succeed to the presidency without election. He served longer than any president in U.S. history not elected to the office. To forestall constitutional uncertainty, Tyler immediately took the oath of office, moved into the White House, and assumed full presidential powers—a precedent that governed future successions and was codified in the Twenty-fifth Amendment. Sitting on the Senate Finance Committee, he voted for two censure resolutions against the president in March 1834. By this time, Tyler had become affiliated with Clay's newly formed Whig Party, which held control of the Senate. The country became deeply divided over the best response to the crisis. Conditions got even worse in early 1842 because a deadline was looming. A decade earlier, when the economy was strong, Congress had promised Southern states that there would be a reduction in hated federal tariffs.