Roosevelt also exposed the suspected collusion of Gould and Judge Theodore Westbrook and argued for and received approval for an investigation to proceed, aiming for the judge to be impeached. Although the investigation committee rejected the proposed impeachment, Roosevelt had exposed the potential corruption in Albany and assumed a high and positive political profile in multiple New York publications.[44]
Roosevelt's anti-corruption efforts helped him win re-election in 1882 by a margin greater than two-to-one, an achievement made even more impressive by the victory that Democratic gubernatorial candidate Grover Cleveland won in Roosevelt's district.[45] With Conkling's Stalwart faction of the Republican Party in disarray following the assassination of President James Garfield, Roosevelt won election as the Republican party leader in the state assembly. He allied with Governor Cleveland to win passage of a civil service reform bill.[46] Roosevelt won re-election a second time and sought the office of Speaker of the New York State Assembly, but Titus Sheard obtained the position in a 41 to 29 vote of the GOP caucus instead.[47][48] In his final term, Roosevelt served as Chairman of the Committee on Affairs of Cities, during which he wrote more bills than any other legislator.