Presidency
As President, Garfield strengthened Federal authority over the New York Customs House, stronghold of Senator Roscoe Conkling, who was leader of the Stalwart Republicans and dispenser of patronage in New York. When Garfield submitted to the Senate a list of appointments including many of Conkling's friends, he named Conkling's arch-rival William H. Robertson to run the Customs House. Conkling contested the nomination, tried to persuade the Senate to block it, and appealed to the Republican caucus to compel its withdrawal.
But Garfield would not submit: "This...will settle the question whether the President is registering clerk of the Senate or the Executive of the United States.... shall the principal port of entry ... be under the control of the administration or under the local control of a factional senator."
Conkling maneuvered to have the Senate confirm Garfield's uncontested nominations and adjourn without acting on Robertson. Garfield countered by withdrawing all nominations except Robertson's; the Senators would have to confirm him or sacrifice all the appointments of Conkling's friends.
In a final desperate move, Conkling and his fellow-Senator from New York resigned, confident that their legislature would vindicate their stand and re-elect them. Instead, the legislature elected two other men; the Senate confirmed Robertson. Garfield's victory was complete.
Source: The White House