Economic History from the GOP
Rep. Michele Bachmann (R-MN): FDR turned a recession into a depression through the "Hoot-Smalley" [sic] tariffs.
Was this what you meant by "New Deal policies that extended the Great Depression"? Smoot-Hawley did in fact deepen and extend the depression. It was co-authored by Republicans Sen. Reed Smoot of Utah and Rep. Willis Hawley of Oregon, and signed into law by Republican President Herbert Hoover.