"Signing a bill that sanctions Russia would mark a significant shift for Trump. He's repeatedly cast doubt on the conclusion of U.S. intelligence agencies that Russia sought to tip the election in his favor. The president also has pushed for cooperation between Moscow and Washington on various matters, such as counterterrorism and the conflict in Syria, and more sanctions against Russia could imperil that effort.

Trump's persistent overtures to Russia drove lawmakers to include a section that mandates a congressional review if Trump attempted to suspend or terminate the sanctions on Moscow. The White House had objected to the review requirement, arguing it would infringe on the president's executive authority and tie his hands as he explores avenues of communication between the two former Cold War foes."

"Vast support for Russia sanctions quashes potential for veto"

Richard Lardner, Associated Press 7-25-17