[1] Warner served as a member of the Michigan House of Representatives the Oakland County district, before the districts of Michigan were divided, from 1851 to 1852.

Then, Warner served as member of the Michigan House of Representatives from the Oakland County 5th district 1865 to 1866.

[2] Warner, in 1867, was delegate to Michigan state constitutional convention.

[1] Warner then served as the Speaker of the Michigan House of Representatives when he served as a member of the Michigan House of Representatives from the Oakland County 3rd district 1867 to 1868.

Warner first served on the Michigan Senate from 1869 to 1870, when he retired from politics.