Roosevelt grew frustrated with Taft's brand of conservatism and belatedly tried to win the 1912 Republican nomination for president. He failed, walked out, and founded the so-called 'Bull Moose' Party which called for wide-ranging progressive reforms. He ran in the 1912 election and the split allowed the Democratic nominee Woodrow Wilson to win the election. Following the defeat, Roosevelt led a two-year expedition to the Amazon basin where he nearly died of tropical disease. During World War I, he criticized Wilson for keeping the country out of the war with Germany, and his offer to lead volunteers to France was rejected. He considered running for president again in 1920, but his health continued to deteriorate and he died in 1919.