On the Republican front, Senator John McCain campaigned in Portland, Oregon on Monday and outlined his plan to address global warming. McCain broke with the Bush administration and called for reducing greenhouse gases by 60 percent by mid-century and for a “cap and trade system” that would allow companies to buy or trade emissions credits. Many groups have criticized McCain’s environmental record. The League of Conservation Voters has given McCain a lifetime grade of 24 percent on what it considers crucial environmental votes.