Senate Majority Leader Harry Reid (D-Nev.) on Thursday said lawmakers have made significant progress on an online sales tax measure, and predicted it could even pass Congress this year.

Reid, speaking at a news conference, said he had long been a supporter of the type of proposal being championed by Majority Whip Dick Durbin (D-Ill.) and Sen. Mike Enzi (R-Wyo.), and noted that Internet retailer Amazon is behind it.

The “very fair” proposal would “help these little strip malls we have all over America,” Reid said.

Retail groups and other supporters have lobbied fervently for online sales tax measures in both the House and the Senate, saying the current law favors Internet retailers over traditional brick-and-mortar stores.