A Republican, he was elected District Attorney for the former 1st Judicial District in his native East Tennessee in 1918, serving until 1926.
In 1930, Lovette sought the Republican nomination for United States Representative from the 1st Congressional District against incumbent Carroll Reece and defeated him in the Republican primary in August, which was tantamount to election. Lovette won the general election in November 1930 without any serious opposition and served in the 72nd Congress. However, in 1932 Reece sought to return to his former seat and defeated Lovette for renomination. Lovette contested the November election as an Independent, a practice then permissible under Tennessee law, but was again defeated by Reece.
Party affiliation: Republican Party