William Preston Lane Jr.

In 1928, Lane returned to politics when he was elected to the school board of Washington County.[3] In 1930, the Democratic candidate for Attorney General of Maryland died unexpectedly and a replacement had to be found. Since Lane had formed a friendship with Albert Ritchie, the Governor of Maryland, he was placed on the ticket and won the seat by a large margin over his Republican opponent.[2]

The highlight of Lane's career as Attorney General was his pursuit of a lynching prosecution on the Eastern Shore of Maryland in 1933.[2][3][4] Two years earlier on the Shore, a notorious lynching had occurred in Salisbury (the lynching of Matthew Williams), the response to which by Attorney-General Lane and Governor Ritchie was heavily criticized.[5] Subsequently, another black man, George Armwood, was arrested and charged with raping a white woman in the adjoining Somerset County and was being held prisoner by police in Princess Anne.[6] However, a mob overran the police and kidnapped Armwood, badly beating, stabbing and mutilating him before the hanging, then burning his body in front of the nearby courthouse.[6] Local police did not pursue prosecution of the lynch mob, but Lane took charge of the investigation.[2] The Maryland State Police and militia were called out by Governor Ritchie to assist, which resulted in further mob violence and arrests on the Eastern Shore, which damaged Lane's reputation.[2][6]

As Attorney General, Lane also pleaded two cases before the United States Supreme Court involving the assessment of submerged lands and the state's right to tax condemned federal lands.[2] Lane chose not to seek re-election in 1934.[2]

After his tenure as Attorney General, Lane remained very active in state and national politics.[3] From 1940 to 1950, he served as a member of the Democratic National Committee from Maryland, and he was a delegate to the Democratic National Convention from 1928 to 1948. In 1944, Lane managed Franklin Roosevelt's Maryland campaign for re-election as President of the United States. Lane also remained active in business, serving as president of an aircraft corporation and a bridge company. He also kept active in law as a member of the firm Lane and Mish.[3]

In 1946, Lane decided to run for governor. In the Democratic primary election, he defeated challengers J. Millard Tawes and H. Streett Baldwin, and then defeated Republican Theodore R. McKeldin in the general election 54% to 45%.[2] As governor, Lane and his administration worked towards improving the public education, mental health, and highway systems of the state. A newspaper report published in 1949 exposed serious flaws in the treatment of the mentally ill in the state, which resulted in the creation of the Department of Mental Hygiene and turned Maryland's mental hospitals by the end of the Lane administration into some of the best in the nation. Major highway improvements which had been deferred by World War II were also put in motion by Lane,[2] which were funded by the enactment in 1947 of Maryland's first state sales tax.[4] The Chesapeake Bay Bridge, which now carries his name, was completed in 1952 under this plan.[4] Several historic state facilities were also renovated during Lane's tenure, including the Maryland State House which had not been adequately preserved since its construction in 1772.[2]

Lane faced George P. Mahoney, a perennial candidate, in the 1950 Democratic primary election held on September 18, 1950.[2] The primary was close and bruising, and left the Lane campaign weakened for the general election against Theodore McKeldin, his opponent in the 1946 election. Additionally, his unpopular sales tax to fund road improvements had caused significant dissent in the state and was used by McKeldin to pull votes away from Lane. On November 7, 1950, Lane was defeated in the general election by 94,000 votes, 57% to 42%. At that point, it was the largest margin of defeat in Maryland history. Lane's term as governor ended on January 10, 1951.[2]

After his term as governor, Lane remained active in the Democratic party and engaged in business pursuits. He died of a heart attack in 1967,[3] and is buried in Rose Hill Cemetery in Hagerstown.[2]