This is an easy, cheap, and boring comment. He's the President. He already won. Adding a tank isn't going to make him feel better about himself, and he's not the one who decides what his motorcade looks like.
Huge swaths of D.C. were shut down and reflagged for President Hu a few weeks agov (red flags and gold stars everywhere!). So yeah, when a big-wig comes into town we notice. The President of Finland? Might make an few lines buried in the local news section....so...it depends.