The Senate will debate a comprehensive energy efficiency bill the last week of July, marking the first time the upper chamber will consider substantive energy legislation since 2007, a Senate Democratic aide told The Hill on Tuesday.

The aide said the breakthrough comes after the bill sponsors, Sens. Jeanne Shaheen (D-N.H.) and Rob Portman (R-Ohio), negotiated a deal on amendments suitable to Senate Majority Leader Harry Reid (D-Nev.).

Controversial amendments held up a similar version of the bill last session, as insiders say Reid was reluctant to trigger a vote on a menu of messaging bills ranging from the Keystone XL oil sands pipeline and greenhouse gas emissions regulations.

This time around, Shaheen and Portman have tried to persuade colleagues to withhold contentious provisions. Shaheen had told The Hill last week that the lawmakers were more concerned about reducing the number of amendments offered rather than their substance.