[grey_whiskers]

Nobody I've ever met, EVER keeps a ball point pen in their sleeve. The ink stains.

Try again, Soros troll-boi. (BTW, whatever he's paying you, he's getting ripped off.)

[Cletus.D.Yokel]

See also:
https://www.freerepublic.com/focus/chat/3888963/posts?page=394#394

[SheepWhisperer]

I lean toward the connecting point of a PICC line.

However there is the possibility that it is a pressure switch for either the communications device he was obviously concealing, or for a small pump, which was pumping meds through a PICC line, concealed elsewhere, dispensing as needed.

A pressure switch located there could be easily depressed by rotating the wrist down toward the edge of the podium while his hands are upon the sides. It appears to be held in place by his watch band.

Isn’t this the location of the USSS mics?

If it is a switch, then I’d guess it’s most likely for coms.

[tang-soo]

Nobody I've ever met, EVER keeps a ball point pen in their sleeve. The ink stains.

Yes, the ink stains, but also, if you fall and catch yourself (a natural tendency), you stab yourself in a pretty dangerous place. No way that's a pen.