I can. The idea is that he’s signaling that an attack on the inauguration won’t injure him, and so it’s mafia talk for “attack the inauguration”.

I don’t support this as a grounds. It’s so flexible that you can see or not see it at will, so, you can give a charitable read to someone you like or a threatening read to someone you don’t. It also relies on mind reading.

Nevertheless a lot of people can read it that way.