He was re-elected in 1851, 1852 and 1853. He served as an 1852 presidential elector, endorsing Franklin Pierce and, in return for his support, Seymour was appointed to serve as minister to Russia and resigned the governorship shortly after being reelected to a fourth term.
Seymour's repeated election victories led to him serving as an electoral representative in 1852, backing Franklin Pierce. In recognition of his support, he received the position of minister to Russia and subsequently relinquished his governorship shortly after being re-elected for a fourth term.