He graduated from Wesley Collegiate Institute of Dover, Delaware in 1898 and from the law department of the University of Maryland at Baltimore in 1903.
He was admitted to the bar in 1903 and commenced the practice of law in Cambridge, Maryland soon after. From 1904 to 1911, Andrews served as State attorney for Dorchester County, Maryland. He was elected as a Republican to the sixty-sixth United States. Congress in 1918, and served the Maryland"s 1st congressional district for one full term from March 4, 1919 to March 3, 1921.
He was an unsuccessful candidate for reelection in 1920, and resumed the practice of law until his death in Cambridge, later serving again in the Mayland State Senate.
He is interred in Washington Cemetery of Hurlock, Maryland.
He served as a member of the Maryland House of Delegates in 1914, and in the Maryland State Senate from 1918 until 1919, when he resigned to enter Congress.
Married Bessie Walworth, October 18, 1903 (died January 21, 1919). Children: William North., Virginia Whittier, Elizabeth, Jane Walworth.