Conservative groups are pushing against the border-adjustment tax, a key provision in the House Republicans' tax plan.
"Unfortunately we've seen a number of politicians, including on the Republican side, pushing this [tax]," Sean Lansing from Americans for Prosperity told The Hill. "We think it's just a massive $1.2 trillion tax hike on American consumers."
Under the border-adjustment tax, imports would be subjected to a 20 percent tax, while exports would be exempted.
"We're the only large economy in the world that doesn't adjust taxes at the border. One-hundred and sixty countries adjust at their borders. Currencies will adjust over time, and I think we'll be in a very good position if we do this."
House lawmakers haven't settled on a border adjustment tax, but retailers are pressing forward with lobbying efforts to prevent a border-adjustment tax from becoming part of tax reform package.