Labour's pledge to introduce a cap on rent prices is a "ridiculous thing to suggest" as it will drive down the quality of property available, according to the Housing Minister.
Kris Hopkins warned "investment and quality" of rented properties had "always fallen" when a cap on the amount of money private landlords could charge was introduced.
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The decision was met with outrage and anger by UK cities which were on the shortlist for the prestigious award.
Mr Lewis is one of a number of Labour and Tory MPs under investigation by party officials over allegations of inappropriate conduct.
A jury has failed to reach a verdict in Emile Cilliers' trial on charges of attempting to murder his wife by tampering with her parachute.