When you live near DC you get a pretty good "eye" for estimating crowd size at a protest. I highly doubt there were 15,000 people there total (maybe, maybe 10,000 but I'd say even lower than that) and we know that no where close to that number went inside the building. Keep in mind that the press will cover sensational stuff like this for the news cycle, but the proceedings are more "lawyer like" and the media will skip the dull parts like actual facts. Such is the nature of news.
Now, if I were to roll out my crystal ball and attempt a prediction, I'd say that five republican senators will roll with "guilty" and the rest will have lawyerly excuses using elements of law to justify their votes. I am almost certain the future will prove me wrong (I also predict the Browns and Buccaneers in the SB!).
The Trump stuff isn't really the good stuff. The slow-burn excitement will come with filling the power vacuum on both sides of party game. It is easy (and accurate) to say that Trump holds remarkable sway over the rank-and-file voters and that Obama holds the same over his party. Both, however, are never getting back in the POTUS chair. I mentioned earlier that I don't think the two party system will last much longer in the US. It is a mistake to assume that the republicans are in more disarray than the democrats...they are simply stuck behind a bad news cycle. Look at it this way...currently both parties are being "directed" (lead is too powerful a word) by four people (Pelosi, McCarthy, Schumer and McConnell) that share a combined age of nearly 71 years (that "kid" McCarthy at 55 is keeping it "low"). The average age of the democratic caucus is 72 years while the average age of the republican caucus is 48! Biden? His age alone ensures he is a one term guy.
Change is coming sooner rather than later and the process, while slow, will be fascinating.