Entering politics as a
Democrat and a supporter of
Martin Van Buren, Boutwell was appointed head of the Groton post office by his business partner, who had been appointed postmaster. Boutwell's first entry into elective politics was a successful run for the Groton School Committee as a Temperance Party candidate; he sat on that committee for many years. The success prompted him to run for the state legislature on the same party's ticket, but as the candidate of a small third party, he lost badly. In 1840, he won the Democratic Party nomination, despite temperance opinions that were "offensive to many", but lost in a
Whig landslide. He won on his third try, defeating incumbent John Boynton in 1841. He won the next two annual elections and lost in 1844 and 1845. He was returned to the state legislature in the 1846 election and served from 1847 to 1850. His elective successes, sometimes in the face of major Whig victories statewide, highlighted Boutwell's potential, and brought him into the Democratic Party's leadership circles. He sat on the judiciary and finance committees, where he gained a reputation for thorough research into legislation, and advocated positions favoring free trade, restraint of the money supply, and increased taxes for spending on education and other reforms. He supported the
Mexican–American War, which, unlike other people at the time, he did not believe was motivated by a desire to expand slavery. While in the
state House of Representatives, Boutwell ran three times for a seat in the
United States House of Representatives, losing by significant margins to his Whig opponents. In 1848, he was considered for the Democratic nomination for governor, placing third at the nominating convention. In 1849, he was appointed state banking commissioner by Whig Governor
George N. Briggs, a position in which he inspected bank charters that were subject to renewal. In this position, he gained a wealth of experience in matters of banking and finance.
Massachusetts governor Throughout the 1840s, advocates of the
abolition of slavery grew to become a significant force in Massachusetts politics. Outrage over the extension of slavery into territories acquired in the Mexican–American War increased the popularity of the
Free Soil Party, but they and the Democrats were unable to unite to unseat the Whigs who dominated state politics until 1850. In 1849, Boutwell won the Democratic nomination for governor. Because no candidate won a majority, the Whig-controlled legislature decided the election, choosing the incumbent Briggs. The campaign brought Boutwell into close contact with
Charles Sumner and
Henry Wilson, leaders of the state Free Soil Party. The parties flirted with the idea of a coalition, with the Democrats adopting an antislavery platform. In 1850, passage of the
Compromise of 1850, in particular the
Fugitive Slave Act, sparked further outrage, and the Democrats and Free Soilers were able to agree to a coalition. On the Democratic side, Boutwell and
Nathaniel Prentice Banks agreed with Free Soilers Sumner and Wilson on a division of offices should the coalition win. The key to their success was control of the state legislature, which would decide the election if no gubernatorial candidate won a majority of the popular vote. Both parties worked to bring out the vote in rural areas sympathetic to their cause. Although Governor Briggs won a plurality of the popular vote (57,000 out of 120,000 votes cast), he did not win a majority, and the legislature was controlled by the coalition. Pursuant to the terms of the deal, Boutwell was elected
governor, Banks was made
Speaker of the House, and Wilson was elected
Senate President. Sumner's election to the
U.S. Senate, also part of the bargain, was contested by conservative Democrats, but the coalition eventually prevailed in electing him. Boutwell was criticized by Free Soilers for taking a hands-off approach to the contentious election of Sumner, neither supporting nor opposing him during the balloting in the state senate. Sumner later accused Boutwell of preventing a more permanent fusion of the two parties. In the 1851 election, the results were similar, despite efforts by the Whigs to drive wedges between the coalition members, and Boutwell was again elected by the legislature after the Whig candidate won a plurality. That election exposed cracks in the coalition, principally on slavery. When Boutwell decided not stand for reelection in 1852, the Whigs regained control of the legislature and elected
John H. Clifford to the governor's chair. On May 26, 1851, Boutwell was elected as a member of the
Ancient and Honorable Artillery Company of Massachusetts. In Boutwell's first term as governor, both houses of the legislature were controlled by the coalition, and its substantial reform agenda was enacted, including election by
secret ballot, although the terms did not satisfy all of the secrecy rules of an Australian ballot, and plurality voting under some conditions. In his second term, Whigs controlled the House of Representatives, and were thus able to thwart most of the reform agenda. Boutwell's call to increase taxes for spending on education, prisons, and mental hospitals went unheeded, but the legislature was passed a call for a
constitutional convention to discuss long-standing demands for changes to
the state constitution. A "
Maine law" temperance reform bill was also approved, but Boutwell was criticized by the Whigs for vetoing the first version of it and then signing the second, allegedly under pressure from Free Soilers.
Constitutional Convention and Republican Party Boutwell was elected a delegate to the
Massachusetts Constitutional Convention of 1853. He opposed the election of judges and the abolition of the
Governor's Council, and supported the elimination of any
poll tax requirements for voting. He served on the committee responsible for drafting the proposals that the Convention submitted to the voters for approval, and was disappointed when all of those proposals were rejected in the ensuing statewide referendum. After the convention, Boutwell took up the study of law in the office of Joel Giles, a patent lawyer from Groton. He was retained by
Middlesex County to oppose the formation of a new county out of parts of western Middlesex and northern
Worcester Counties. He helped found the Groton Public Library, and continued to be active on the Groton School Committee. In 1855, he was appointed secretary of the state Board of Education, a post he held for five years. He was admitted to the Massachusetts bar in 1862. In the aftermath of the coalition breakup in 1852 and the failure of the 1853 convention, Massachusetts political parties broke down into factional interests. In August 1855, four major factions were holding meetings in a Boston hotel, attempting to find common ground for the upcoming state election. Boutwell convinced the groups to attend a grand meeting, at which he argued that they should form a "union against slavery". Out of this and related activity the state's
Republican Party was born. Despite his role in its early formation, Boutwell remained somewhat apart from the organization because of his job at the Board of Education. He did however continue to speak out against slavery, noting that the nation was embarking on a "period of intense trial", and that "people will make war" over slavery. In 1860 he chaired the Republican state convention and supported Republican candidates for office. ==Early Civil War years==