On Tuesday, Utah Sen. Orrin Hatch's announced that he would not seek an eighth term. That's cleared the way for an all-but-certain run by former Massachusetts governor and 2012 Republican presidential nominee Mitt Romney. Romney now lives in Utah and is enormously popular among voters there. However, that popularity doesn't necessarily extend to Trump's White House. In Trump's White House establishment Republicans like Romney are often viewed with deep skepticism. If Romney goes to Washington as a Senator he could open a new chapter in Trump's fraught relationship with Senate Republicans. Stylistically, the two men could not be more different. Romney, who is deliberate, diplomatic and steeped in policy, was often criticized as the 2012 Republican nominee for being too cautious. Trump, on the other hand, continues to be defined by his provocations and cavalier approach to serious matters.