since - adv. after some point in the past; at a subsequent time In that sense if the word, the sentence: "Trump's environmental regulatory bonfire is somethin

since - adv. after some point in the past; at a subsequent time In that sense if the word, the sentence: "Trump's environmental regulatory bonfire is something Republican presidents have sought to do since Nixon" would indicate Republican presidents in the time period subsequent to Nixon. Which I think makes sense, ymmv.