While attending law school, he was elected to the
Missouri House of Representatives in 1950 and served until 1961. He served as majority floor leader from 1957 until leaving office. In 1960, he ran for
secretary of state of Missouri. In the primary, he defeated
James Kirkpatrick, garnering 42.15% of the vote. He defeated Joseph Badgett in the general election with 56.18% of the vote.
Governor of Missouri In
1964, Hearnes challenged the remnants of the
Tom Pendergast political machine in the race for governor. During the primary he campaigned against
Kansas City establishment candidate
Hilary A. Bush charging, "At one time all Missouri was controlled from Kansas City by a man named Pendergast. This type of machine politics should never be allowed to rear its ugly head again in
Missouri politics." Among Hearnes' plans was an effort to gain support in western Missouri by the establishment of a four-year college (
Missouri Western State University) in the population center of
St. Joseph, Missouri despite the presence of a state college (
Northwest Missouri State University) less than 50 miles away in the much smaller city of
Maryville, Missouri. Hearnes also campaigned against the Central Trust Bank of
Jefferson City, Missouri (which, since its 1902 founding by
Lon Stephens, had been the central depository for state funds), saying that the bank's power was creating an atmosphere where establishment forces would "select rather than elect" a leader. Hearnes won the primary over Bush with 51.9% of the vote. In the general election he won by more than 500,000 votes and 62% of the vote, defeating Republican
Ethan A.H. Shepley, chancellor of
Washington University in St. Louis. His lieutenant governor in the race was
Thomas Eagleton. In 1965 the constitution was amended to permit governors to serve two consecutive terms. Hearnes considered running as a
favorite son candidate in the
1968 Democratic Party presidential primaries, but ultimately withdrew his candidacy. He chaired the Missouri delegation to the
1968 Democratic National Convention, which was selected by a traditional caucus of party members and overwhelmingly supported the candidacy of
Hubert Humphrey. At the convention, he spoke in support of President
Lyndon B. Johnson's Vietnam policy. Despite this, Hearnes voted to pass a minority report from the convention's Rules Committee which ultimately established the
McGovern-Fraser Commission, which would substantially democratize the Democratic primaries. Historians of the primary process have disputed whether Hearnes was confused when he made his vote, or whether he had been convinced by the arguments that a more open primary process was preferable. Hearnes' vote was instrumental to the passage of the minority report, as the entire Missouri delegation followed his lead; this supplied the report with its margin of victory. Hearnes' priorities as Governor included improving
public education, bettering the state's highways and
traffic safety, as well as civil rights and the environment. State aid to public schools increased from $145.5 million to $389.2 million during Hearnes' term as governor, an increase of 167%, and he also increased state aid to higher education from $47.5 million to $144.7 million, an increase of 204%. He oversaw the increase of state aid to
vocational education from $856,000 to $8.8 million, fostering the establishment 53 new area vocational educational schools. While Hearnes was Governor, the State of Missouri built 350 miles of four-lane highways throughout the state. He also created the Missouri Division of Highway Safety and enacted a law providing mandatory breath tests for suspected drunken drivers. Hearnes increased uniform strength of the
Missouri State Highway Patrol from 500 to 750 officers. Hearnes was Governor during the
Civil Rights era and as Governor he signed a Public Accommodations Law, Missouri's first civil rights act. As governor he also strengthened the Fair Employment Practices Act and increased the staff of the
Human Rights Commission from two employees to 35. Hearnes also enacted the state's first
air pollution law, with subsequent strengthening of its provisions. He oversaw the passage of a $150 million water pollution bond issue to provide state matching funds for sewage control construction projects, and created the state's Clean Water Commission to enforce water pollution laws. He also was responsible for the provision of first state financial grants for mass transit and urban rapid transit facilities. He created the Department of Community Affairs to assist local governments in obtaining technical assistance and grants for city planning, zoning, housing, sewage treatment, industrial development, and other municipal and regional projects. In 1970, he was elected chairman of the
National Governor's Association which held its annual conference at
Lake of the Ozarks. In the
1972 Democratic Party presidential primaries, he supported
Edmund Muskie for president and was considered a possible running mate, had Muskie won the nomination. == Post-gubernatorial career ==