Charles Francis Adams, like Charles Sumner, joined the Free Soil party at its formation. He and Sumner became friends during their mutual estrangement from the Whig Party. That friendship came just when Sumner alienated many of his previous social circle and won ostracism from much of Boston high society for his increasingly outspoken antislavery politics. Now Sumner stood poised for election to the Senate, but dissenters in the Free Soil-Democracy coalition put forward Adams’ name in his place. They reasoned that in a few years their party might achieve unaided dominance of Massachusetts politics and damned the coalition for its corrupting potential. Better to either let the Senate seat remain vacant until their triumphant solo victory or align with the Whigs and elect a solid antislavery man. Sumner’s infamous devotion to the issue made him solid enough for most, but he had readily quit the Whigs where Adams maintained connections within his old party. As such, Adams made the ideal candidate for men already set on a Whig antislavery coalition for much the same reasons that made Sumner ideal for a Democratic one.
Adams agreed, declaring that John Palfrey’s proposal completely won him over. The dictates of conscience and duty aligned for it sufficiently to draw him out of his brief political retirement. Indeed, as he wrote to the Boston Atlas,
the questions of casuistry presented to the Free Soil party are in my mind so wholly clear as to admit no difference of opinion in the determination of them among honest men.
Every decent Free Soil man should threat about the Democracy using and abusing their movement. They should all fear that the Democrats they agreed to prefer for statewide office might turn on them and serve the nation’s more proslavery party. That said,
I have as much confidence in the purity of purpose of the party which which I act, as I ever had; and though I may not agree with the majority in the use of means to attain an end, yet I fully belive [sic] the end we mean to reach is one and the same-the preponderance of the principles of Freedom in the National policy.
To this point, Adams has sounded entirely in Palfrey’s vein. He spends most of the length of his letter endorsing his fellow’s program and motives. One could read it as Adams accepting the presumptive nomination. He then acknowledged the appeal of an antislavery Senator of Sumner’s stripe, calling his friend “one of our ablest and most honest and most inflexible advocates.” Adams felt a “temptation” to overlook all Palfrey’s worries. So he did:
Most especially should I be reconciled to every thing short of a dissolution of the party into old line democracy, if it could ring the political knell of one, whose loose private and wavering public career has done more, in my humble judgment, to shake the principles and unsettle the highest policy of puritan New England, than that of any man known to its history.
In short, Adams would like to take a place in the Senate and use his power their to defeat slavery. He worried about the Democrats turning on his party. But he trusted Sumner’s convictions and he believed the risks of coalition worth the gain of deposing such a pliable tool of the slave power as Robert Winthrop.