Congress will grill Big Oil executives at what is likely to be a contentious hearing on Capitol Hill today amid widespread anger over high gas prices.

The Senate Finance Committee, chaired by Montana Democrat Max Baucus, is poised to question Chevron's John Watson, Shell's Marvin Odum, BP's Lamar McKay, ConocoPhillips' James Mulva, and Exxon's Rex Tillerson.

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