[110] Shortly after Roosevelt's return to the United States, Republican Congressman Lemuel E. Quigg, a lieutenant of party boss Tom Platt, asked Roosevelt to run in the 1898 gubernatorial election. Prospering politically from the Platt machine, Roosevelt's gradual rise to power was marked by the pragmatic decisions of New York machine boss T. C. "Tom" Platt, who served as a U.S. senator from the state.[111][112] The demonstrated willingness of Platt to compromise with the GOP progressive wing led by Roosevelt and Benjamin B. Odell, Jr., resulted, over time, in their growth of political strength at the expense of the "easy boss," whose machine faced collapse in 1903 at the hands of Odell.[113]
Platt disliked Roosevelt personally, feared that Roosevelt would oppose Platt's interests in office, and was reluctant to propel Roosevelt to the forefront of national politics. However, Platt also needed a strong candidate due to the unpopularity of the incumbent Republican governor, Frank S. Black. Roosevelt agreed to become the nominee and to try not to "make war" with the Republican establishment once in office. 