He was first elected to the United States Congress to replace Rice Garland and took his seat on December 17, 1840. He was re-elected in the general election and served until March 3, 1843.
Later career and death
Moore moved to Iberia Parish and married Mary Weeks, widow of the builder of the plantation Shadows-on-the-Teche.[3][4] He was elected to the United States Congress again in 1850, serving a single term in 1851 to 1853; he was the last Whig elected to Congress from Louisiana. In 1861 Moore was a delegate to the Louisiana secession convention.
He died in Franklin, Louisiana on June 17, 1867, and was buried on his estate.