With the elections of 1850, the Free Soil-Democrat coalition took control of Massachusetts. That coalition did not amount to a full fusion movement, but rather the local Democracy and Free Soil elements jointly agreeing on individual candidates while remaining independent. Massachusetts still returned a Whig plurality, but the Democrats and Free Soilers together outnumbered them. With victory in hand, the real horse trading began. The Free Soilers agreed to back the Democrat’s man for governor, George S. Boutwell, as well as the lieutenant governor and various officers in the legislature. The Democracy could also place their own man to finish the rump of Daniel Webster’s last Senate term. The Free Soilers claimed the state senate presidency and the full term for the United States Senate beginning on March 4, 1851. The leadership of both groups hashed out the settlement and presented it to their caucuses, who agreed. On January 7, the Free Soilers nominated Charles Sumner to go to Washington by a vote of 84-1. The Democrats concurred, with only six opposing.
The Whigs promptly erupted at the outrageous trading of offices, on the grounds of keeping politics pure and free from interested men and, incidentally, because they lost. Daniel Webster blamed the failure at the polls on his replacement in the Senate, Robert Winthrop. Winthrop refused to endorse the Fugitive Slave Act and that torpedoed Whiggery’s chances by making him look like a crazy abolitionist. He should have gone all-in on the entire Compromise of 1850. Godlike Dan, Secretary of State for Millard Fillmore, set to purging Sumner men from the civil service and aimed to lead his Boston Whigs into a new organization. Webster had wished for a party all to himself for probably as long as he had considered himself a Whig of any kind and the fraught times must have seemed ripe enough for another go. His supporters set about wooing the new governor, who had positioned himself as a pro-Compromise man in his inaugural.
Not every Massachusetts Whig, present or former, bought what Webster tried selling. Far more of them believed Black Dan’s course an excellent way to lose elections and remained open to some kind of alignment with ex-Whigs in the Free Soil movement. They had Charles Francis Adams in mind for the Senate. On the other side of the aisle, the Democracy cared more for breaking Whig dominance than advancing Sumner’s career. But since the senate seat meant less to them than action at the state level, and Sumner had worked well with Democrats before, most found him acceptable.
A minority led by Caleb Cushing felt otherwise and kept strategic silence during the office trading, right up through Boutwell’s election. Then he led them out to make their own caucus against Sumner, the “Indomitables.” More than thirty strong, they had enough votes to swing the senate election against either Winthrop, Webster’s man again, or Sumner. Cushing hoped to defeat both and make himself a senator in the name of conservative Whiggery. Failing that, he turned to Edward Everett. Mainly, however, Cushing put pressure on the coalition Democracy with help from Lewis Cass and other party luminaries. That, Webster’s wooing, or both moved Boutwell to disclaim any interest in Sumner’s election, pawning the matter off on the legislature.