The House Managers have convinced all of the Republicans it's possible to convince

[StarfishSaver]

7. I'm not sure that's a good idea

Calling witnesses isn't a quick thing. They will have to vote on subpoenas, then issue them, and serve them, which takes several days.

And, is any good trial lawyer would tell you, you never want to put a witness on when you don't know what they're going to say. So they would need to depose witnesses in advance, if possible, which takes more time. And that won't happen with any hostile witness, who won't submit to a deposition, which means they'd be putting people on the stand without any clear sense of what they would say. It could be a mess.

And for what result? As I said, nothing anyone says is going to change any more minds, so it won't affect the outcome. Some may argue that it's important to get them on the record for history's sake, But as I also said, impeachment trial is not the end of it. There will be many more opportunities to get this information into the public record.

I just don't see how calling witnesses at this point in the impeachment process would be helpful. It would delay and slow down the process, not change the outcome, blunt the powerful message and momentum the House managers have created and possibly muddle the very clear message they've presented.