US President Donald Trump and Secretary of State Marco Rubio are considering firing US ambassador to Greece Kimberly Guilfoyle after a series of reports alleging she has engaged in improper and possibly illegal conduct before and during her tenure in Athens. A senior US official said on Sunday that Trump and Rubio are “extremely p***** off” by Guilfoyle’s reported conduct and are likely to decide on what action to take this week after Monday’s Columbus Day holiday. The official, who spoke on...