Cap-and-trade is a tax. Dems know it and Republicans seem to understand it, too. The Hill:

House and Senate Republicans intend to ramp up their attack of the Democratic-sponsored clean-energy legislation this week in an effort to brand the measure a “national energy tax.”
According to a GOP leadership aide, the Democrats’ American Clean Energy and Security Act of 2009 that minority party members refer to as “cap and tax” offers them a “huge opportunity, and we will use it to hammer that tax message in a communications offensive over the next four weeks — that this bill amounts to a national energy tax that will destroy jobs and increase costs for every single American.”
GOP conference aides seized on an opportunity to demonstrate that there is bipartisan opposition to the nearly 700-page clean-energy bill. On Friday, they were quick to download and forward to reporters a clip of the Energy and Commerce Committee’s most senior member, John Dingell (D-Mich.), calling his party’s clean-energy bill a tax hike.