Now that Trump has officially announced that he has no objections to the Senate calling witnesses in the impeachment trial since that is within their authority, I hope they will. Of course the past behavior of Republican Senators is that they always FEAR that the President will change his mind and attack them if they do. But the public wonders if these Senators will be able to finally discover that they do have a spine, they took an oath and they are in front of the Chief Justice of the land. Unless their FEAR has taken on such proportion that they are paralyzed and no longer have the power to act on their own!
Impeachment Observation
On the surface it appears that the two articles of impeachment passed on a partisan basis but, I believe, one needs to look at the underlying political current driving the vote count. The House Speaker went on record to sat that Democratic members were free to vote any way they wished but they should have their conscience and oath be their guidance. The Minority Leader instructed Republicans to maintain unity and to attack the proceedings as being a sham and being done too quickly. Meanwhile the President has a reputation to aggressively attack and bully anyone daring to take a stance against him. That means that we can look at the impeachment vote through two lenses. One is that the Democrats voted out of conviction that the President did wrong while the Republicans voted because they feared retribution from their Party Leader, the President. Another possibility is that the Republican party as we know it for many, many years no longer exists and those ramifications are too dire to predict!