Trump is shown as sneaky, deceptive, and corrupt. His short stature shows how little we should feel about him. Putin is shown as a little monster hiding in a bag in the closet. Based on what he says in the cartoon it is implied he is concerned about his reputation. They both are shown in a negative light. There is one symbol that exists in the cartoon. It is the Putin monster in the bag representing Russians involvement hidden within Trump's unreleased tax returns. The artist is conveying that literally the involvement of Russia in the tax returns are like this little monster worried about being found. Trump and Putin are trying to do work together secretly without anyone finding out. The artist in the bottom right brings it up as "a shelter". This covering up of Trump's tax returns are like a shelter preventing accusations to be proven against Russia and Trump.
The message this cartoon clearly states is that Trump and Russia are up to something but don't want anyone to find out about it by hiding it. A way people can find out about the involvement is through Donald Trump's tax returns. The artists really makes Trump and Putin to be monsters, in fact one of them looks like a monster. The artists want people to realize that despite these two's efforts they are up to no good and they should be stopped. While there is no depiction of removing anything, I feel the artist is trying to convince the reader