CAMBRIDGE, Mass. - Sen. Elizabeth Warren is quickly becoming a prized Democratic campaigning powerhouse, hitting the road on behalf of candidates in key races the party will need to win to retain control of the U.S. Senate in November.
Since March, the Massachusetts Democrat, a leader of the party's liberal wing, has stumped for candidates in Ohio, Minnesota, Oregon, Washington and Kentucky and has trips planned this week to West Virginia and Michigan.
Along the way, Warren has found her brand of economic populism resonating far from her home in the liberal enclave of Cambridge.
Republicans, however, have pointed out that Warren's views are sometimes an awkward fit in other parts of the country.
They've noted that Warren supports efforts to restrict carbon dioxide emissions, opposed by many in Kentucky and West Virginia.
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