It isnt my fault Trump was so secretive.
This is such a dumb question that I have seen all over twitter. First off Russia has been involved in Syria over the last several years, so it is possible they wanted to get that more sorted out first. Secondly, taking over a large European country isnt something you just plan and do over night. 3rd, how do you know he didnt want to cause problems for Trump? It might not be that he was scared of him like so many are implying, it could be he didnt want to put him in a tough spot at home, especially before an election. We just dont know for sure.
THere are also rumors that he is seriously ill, which if true, could be affecting his thinking to some degree.