Wehenkel was first elected to the Chamber of Deputies in 1951, and would continue to be so until 1974. Wehenkel withdrew from sitting as a deputy to take his place in the government of Pierre Werner between 1964 and 1969, holding the position of Minister for the Budget and the newly created office of Minister for the National Economy and Energy.[2] With the LSAP ejected from government by a shift of coalition in 1969, Wehenkel turned to be President of the Chamber, which he remained until 1974, when he retired from politics.