He represented the Raglan electorate from 1943 to 1946, when he was defeated by Hallyburton Johnstone. Johnstone had previously won the seat for National in a 1946 by-election held on 5 March (i.e. before the general election on 27 November).
Baxter was a flight lieutenant in the RNZAF; and was awarded the DFC in 1944, with a Bar awarded in 1945.