John McCainJohn McCainUkrainians made their choice for freedom, but now need US help White House orders intelligence report of election cyberattacks Senate votes to elevate Cyber Command in military MORE's stance on climate change has proven to be controversial with at least one group of economic conservatives, as the Club for Growth today criticized the Arizona Republican's support for a cap-and-trade system.

The concept would set mandatory limits on greenhouse emissions, and allow companies that pollute less to sell their permits to those that pollute more.

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