OVERNIGHT ENERGY: National Guardsman: Removing protesters from Lafayette Square was an ‘unprovoked escalation’ | EPA watchdog kicks off probe after agency slashed fuel efficiency regs | Feds to limit water pollution enforcement where states have taken act

HAPPY MONDAY! Welcome to Overnight Energy, The Hill’s roundup of the latest energy and environment news. Please send tips and comments to Rebecca Beitsch at rbeitsch@thehill.com. Follow her on Twitter: @rebeccabeitsch. Reach Rachel Frazin at rfrazin@thehill.com or follow her on Twitter: @RachelFrazin.CLICK HERE to subscribe to our newsletter.COUNTER TO THE WHITE HOUSE: A National Guard official will testify that a Park Police operation to…