Critics turned up the heat on Sen. Mark Udall, Colorado Democrat, after it was revealed he was among those invited to billionaire Tom Steyer's Democratic Senatorial Campaign Committee fund-raiser. (Associated Press)
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Critics turned up the heat on Sen. Mark Udall, Colorado Democrat, after it was revealed he was among those invited to billionaire Tom Steyer's Democratic Senatorial Campaign Committee fund-raiser. (Associated Press)
