Mike Pence's current Wikipedia Profile Pic. Keep in mind that on Wikipedia, he or his staff can change this photo anytime they wish.
Donald Trump's VP's facial expression here is one variation of what in common parlance most people would call a "WTF expression" (What The F*ck?!).
To approach this from a scientific, clinical and more specifically - a nonverbal viewpoint, the primary emotion being conveyed (and felt) here is Contempt while his secondary emotions in this moment are Disbelief/Incredulity and Disgust.
Regardless of one's political prominence, the views of your opponent or your beliefs - this is NEVER an image one should ever want to be representative of them - particularly those in leadership positions.
Nonverbal Communication No. 3625: Donald Trump Introduces Mike Pence as his "1st Choice" VP Pick (Not!)
Nonverbal Communication Analysis No. 3609: Emma Watson, Tina Turner, Ring Tones and Body Language
Nonverbal Communication Analysis No. 3618: Salma Hayek regarding Donald Trump
Nonverbal Communication Analysis No. 3617: President Obama and Speaker Ryan regarding the Dallas Shooting
Nonverbal Communication Analysis No. 3575: Hillary Clinton vs. Donald Trump - Comparison Their of Wikipedia Profile Photos
Nonverbal Communication Analysis No. 3542: Lara Croft, Keeley Hawes, Sexual Energy and Body Language
Nonverbal Communication Analysis No. 3519: Vladimir Putin, The Panama Papers and Body Language
Nonverbal Communication Analysis No. 3507: Henry Cavill, Ben Affleck and Amy Adams Do The Batman Voice - The Graham Norton Show