quality:corruption, structural:summarization
Roosevelt's "New Nationalism"

In August 1910, Roosevelt escalated the rivalry with a speech at Osawatomie, Kansas, which was the most radical of his career. It marked his public break with Taft and conservative Republicans. Advocating a program he called the " New Nationalism ", Roosevelt emphasized the priority of labor over capital interests and the need to control corporate creation and combination. He called for a ban on corporate political contributions. Returning to New York, Roosevelt began a battle to take control of the state Republican party from William Barnes Jr.. Taft had pledged his support to Roosevelt in this endeavor, and Roosevelt was outraged when Taft's support failed to materialize at the 1910 state convention. Roosevelt campaigned for the Republicans in the 1910 elections, in which the Democrats gained control of the House for the first time since 1892. Among the newly elected Democrats was senator Franklin D. Roosevelt, who argued he represented his distant cousin's policies better than his Republican opponent.

The Republican progressives interpreted the defeats as a compelling argument for reorganization of the party in 1911. Senator Robert M. La Follette joined with Pinchot, William White, and California Governor Hiram Johnson to create the National Progressive Republican League; their objectives were to defeat the power of political bossism at the state level and replace Taft at the national level. Despite his skepticism of the league, Roosevelt expressed general support for progressive principles. Between January and April 1911, Roosevelt wrote articles for The Outlook, defending what he called "the great movement of our day, the progressive nationalist movement against special privilege, and in favor of an honest and efficient political and industrial democracy ". With Roosevelt apparently uninterested in running in 1912, La Follette declared his own candidacy in June 1911. Roosevelt continually criticized Taft after the 1910 elections, and the break between them became final after the Justice Department filed an antitrust lawsuit against US Steel in September 1911; Roosevelt was humiliated because he had personally approved an acquisition the Justice Department was now challenging. However, Roosevelt was still unwilling to run against Taft in 1912; he hoped to run in 1916 against whichever Democrat beat Taft in 1912.