Democratic Leader Rep. Nancy Pelosi hedged Thursday on the possibility of House Democrats taking up the U.S.-Mexico-Canada Agreement on trade, saying that the vote would come down to strength of the deal’s implementation language.

“This bill has good features to it but it doesn’t matter if it doesn’t have enforcement,” Pelosi, who is likely to return as House speaker next year, told reporters Thursday. “Enforcement in terms of the labor provisions. Enforcement in terms of the environmental provisions.” The deal would replace the North American Free Trade Agreement.