They're parties had different views on one matter which made them split and have the two leaders turn on each other even they had a personal friendship. It was partly because of the view on the popular election of Judges which the Conservatives- Taft's party- opposed. Other than that, they really weren't much different.
Teddy Roosevelt decided to run for presidency in 1912 because he was not satisfied with the decisions and actions of President William H. Taft. He also regretted not running for re-election in 1908.
Because the Republican Party turned there backs on him and everyone thought he was a boring president!
The candidates in 1912 were the incumbent Republican,Wm. Howard Taft, the Democratic candidate, Woodrow Wilson and ex-president, Theodore Roosevelt who ran as a third-party ( Bull-Moose) candidate. Roosevelt got more votes than Taft but not enough to beat Wilson.
Roosevelt challenged Taft primarily because he believed Taft was not adhering to progressive principles, particularly in terms of trust-busting and conservation policies. After leaving office, Roosevelt was dismayed by Taft's support for tariffs that favored big business and his reversal of some of Roosevelt's policies. Additionally, Roosevelt felt a personal sense of betrayal, as he had endorsed Taft for the presidency in 1908. This rift ultimately led to a split in the Republican Party, with Roosevelt running as a third-party candidate in the 1912 election.
because the president wher in war.
Roosevelt believed that Taft did not deal with trusts aggressively enough.
William Howard Taft's political descisions infuriated Roosevelt.
Woodrow Wilson
Taft and Roosevelt had a close relationship while Theodore was president. After Roosevelt left office upon Taft's inauguration, Taft felt overwhelmed with the office and even asked Roosevelt for advice, which Roosevelt was uncomfortable giving. Roosevelt later decided to run against Taft in 1912, which ended their friendship.
He ran against Taft in 1912.
Roosevelt served almost two full terms since he became President very early in Mckinley's second term. Therefore, he declared that he would not seek a third term in 1908. As 1908 approached he began to have second thoughts and was reluctant to give up the Presidency, but did so. By 1912, he was even more sure that he could do a better job than President Taft and tried to get the Republican nomination. After he failed at that, he formed his own party in order to run anyway, against both Taft and the Democrat, Wilson.
Woodrow Wilson won the 1912 presidential election defeating Theodore Roosevelt. In the 1912 presidential election Woodrow Wilson received 435 electoral votes and Theodore Roosevelt received 88 electoral votes. The popular vote totals were Wilson 6,293,152 and Roosevelt 4,119,207.