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In this election season, any reference to tax increase, especially for a conservative Republican, is toxic.

U.S. Rep. Steve Womack (R-Ark.), one of the sponsors of the federal online sales bill, which Congressional Republicans are wary of supporting out of fear that their constituents will view it as a tax increase. About a dozen GOP governors support the measure.

U.S. Rep. Steve Womack (R-Ark.), one of the sponsors of the federal online sales bill, which Congressional Republicans are wary of supporting out of fear that their constituents will view it as a tax increase. About a dozen GOP governors support the measure.

Caroline Cournoyer is GOVERNING's senior web editor.