I realize Republicans think that everyone else just wants to see Trump fail. So, everyone else is just looking for something that isn't there (See Benghazi).
No, there is not concrete proof of anything but man is there something coming out it seems every week. Trump actually had a couple of good things happen that this over shadows. The speech was really good for his base. The Job numbers aren't tanking, so people have confidence to hire. That is a good thing no matter your party. He had a couple of good appointments but he just can't take advantage of any of it. Because every time we turn around, there is something that comes out in regards to his teams relationship with Russia.
Now you could make the argument at one point or another that the media has to do with this. A lot of leaks but the thing with blaming Obama for wire tapps, he really stepped in it himself. I'm sure he wasn't expecting the backlash but that is the kind of thing you only talk about if you have already proven it. That is a major crime. You can't do that as a sitting president.
Also, man this dude would get a lot more respect if he lost that damn twitter. It is far beneath the presidency.