Here's an interesting angle to this story (and I hope a lawyer on this site will correct me if I'm wrong): If Cohen was actually being investigated for anything related to the 2016 election campaign, I believe Trump's campaign funds could have been used to pay his legal fees. The fact that he was on his own in this case is all you need to know. In fact, I would not be surprised if he agreed to the "illegal campaign contribution" plea deal as a way to try to recover some of his legal fees.
Took lessons from the Clintons when they were raising money to pay all their legal fees. Lanny Davis knows about that!
I’m going to charge my client a whole boatload of money and I want you to help him pay my bill. Yep - right away, sir!