Boozing and brawling are no-nos. The most common reason for using social media as part of their evaluation process is to ensure the candidate is a good culture fit (55%), followed by looking for signs of illegal activity (45%), then curiosity (34%) and to see whether the candidate is invested in their career (29%).

At a bill signing event at the White House, Trump invoked his high-profile former aide, saying "Now I know why Elon doesn't like me so much."