McClure served as a member of the Pennsylvania Senate for the 9th district from 1929 to 1937.
McClure was a major force in the Republican party in Chester, Pennsylvania, and then in Delaware County. He built one of the strongest and most corrupt political machines in U.S. history. McClure led the Delaware County Republican Board of Supervisors, also known as the War Board, which controlled county politics for decades.[5] McClure hand picked candidates for county, city council, mayoral and school board elections.
The base of power for McClure and the Chester and Delaware County Republican political machine was liquor. McClure controlled local and county level officials dependent on Chester's liquor licensing and saloon trade.
On November 23, 1933, McClure and 69 associates in the "rum ring" trial were found guilty in federal court of vice and rum running.[8] The prosecution charged that McClure received protection money and created weekly lists of speakeasies that would be permitted to operate and those that did not pay up and were to be closed. The prosecution contended that in 11 years of operation, the rum ring was able to charge between $25 and $200 a week for every illegal speakeasy in Delaware County to operate and raised $2,748,900 in collection fees.[9]
Ships were allowed to bring liquor shipments into Chester at a rate of $1.50 per sack. An ex-constable testified at trial that he personally handed McClure $30,000 from one shipment. Between the summer in 1929 and January 1931, one Philadelphia bootlegging gang paid McClure between $65,000 and $70,000 for liquor brought through the Chester port.[9]
In 1933, McClure was sentenced to 18 months in prison and assessed a $10,000 fine but he did not serve one day nor pay the fine because of the repeal of the Eighteenth Amendment to the United States Constitution. McClure's trial occurred after repeal had been voted on. His appeal to the U.S. Circuit Court of Appeals was upheld on this technicality and came within the decision of the United States Supreme Court that all liquor prosecutions pending on the date of repeal of prohibition were to be thrown out.[9]
After McClure's conviction, an effort was made to remove him from the Pennsylvania Senate but it failed. McClure lost his reelection bid for Pennsylvania Senate in 1936 to Weldon Brinton Heyburn[1] due to public outcry over his protected status and ability to avoid imprisonment. Following the loss, McClure retired to Florida but was persuaded to move back to Pennsylvania by J. Howard Pew and Joseph N. Pew Jr., owners of the Sun Shipbuilding & Drydock Company in Chester, and accept the position as Delaware County's Republican Party leader. They offered McClure funding for future elections and control over hiring decisions for all positions at the Sun shipyard and Sun Oil refinery in nearby Marcus Hook. One had to have a letter of recommendation from McClure in order to be hired at the shipyard.[12] Republican party membership was a prerequisite to employment at the Sun shipyard and president J. Howard Pew would call "mandatory meetings" for machine-sponsored political rallies.
In 1941, McClure was indicted for conspiracy to gain a $250,000 profit from the sale of the Chester Water Works to a private buyer. McClure and four Chester City Council members were acquitted but ordered by the court to return the money to the city of Chester.
In the 1960 presidential campaign, Richard Nixon was campaigning in Chester, Pennsylvania. McClure was in poor health but due to his prominence in Delaware County Republican politics, Nixon stopped his motorcade as it moved down Providence Avenue in front of McClure's house and went up to the porch to shake McClure's hand.[14]
