Energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation

Panelists are assembled at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation on Tuesday, Sept. 4.

Retired Gen. Wesley Clark speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Sen. Amy KlobucharAmy KlobucharCruz: Jokes about me in Franken's book 'obnoxious' The Hill's 12:30 Report Dem senators accuse Trump of purposefully holding back information MORE (D-Minn.) speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Mike Lambach speaks at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Retired Gen. Wesley Clark speaks with Amy Caulkins at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.

Mike Lambach greets Sen. Amy Klobuchar (D-Minn.) at an energy efficiency event hosted by Ingersoll Rand, The Hill and The Echo Foundation.