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WASHINGTON, D.C. - FEBRUARY 28: Sen. Heidi Heitkamp (D-ND) speaks to the press after President Trump signed an executive order aimed at undoing former President Barack Obama's Clean Water Rule at The White House on February 28, 2017 in Washington, D.C. (Photo by Zach Gibson/Getty Images)

WASHINGTON, D.C. - FEBRUARY 28: Sen. Heidi Heitkamp (D-ND) speaks to the press after President Trump signed an executive order aimed at undoing former President Barack Obama's Clean Water Rule at The White House on February 28, 2017 in Washington, D.C.     (Photo by Zach Gibson/Getty Images)