Chase was elected to his first term as a Member of the Legislative Assembly of Alberta for the constituency of Calgary-Varsity on November 22, 2004.

He was defeated in a landslide running in the electoral district of Calgary Foothills by Finance Minister Pat Nelson.

He defeated Progressive Conservative candidate Michael Symth in what was considered an upset win.

He has since represented the riding of Calgary Varsity, which was previously considered a Progressive Conservative stronghold.

Chase ran for a second term in office in the 2008 Alberta general election, he was re-elected holding the electoral district with a comfortable plurality.