Career
Cook ran for a seat to the Alberta Legislature in the 1921 Alberta general election as a United Farmers candidate in the Pincher Creek electoral district. The race for the seat was hotly contested with four candidates running. The 1926 Alberta general election saw Cook and Bossenberry face each other for the second time.
The three way race went to a second count with Cook winning by 52 votes after the second choice preferences were counted.
Cook ran for a third term in the 1930 Alberta general election. He faced Bossenberry for the third time, this time in a straight fight.
Bossenberry edged Cook out by 39 votes to defeat him. Cook tried to regain his seat running in the 1935 Alberta general election.
There were four candidates in the race this time.
He faced Bossenberry for the fourth straight time who was defeated finishing second.