Are you slow witted or something?
https://www.nytimes.com/2017/08/02/world/europe/trump-russia-sanctions.html
WASHINGTON — President Trump signed legislation on Wednesday imposing sanctions on Russia and limiting his own authority to lift them, but asserted that the measure included “clearly unconstitutional provisions” and left open the possibility that he might choose not to enforce them as lawmakers intended........
....As other presidents have in the past, Mr. Trump protested that Congress was improperly interfering with his power to set foreign policy, in this case by imposing waiting periods before he can suspend or remove sanctions first imposed by former President Barack Obama while Congress reviews and potentially blocks such a move.