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 Jean KlobucharDem senators introduce bill to ban controversial voter purges Democrats protest Trump's immigration policy from Senate floor The Hill's Morning Report — Sponsored by PhRMA — GOP lawmakers race to find an immigration fix 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.