Assuming Trump cooperates and doesn't block it, in which case it goes to the courts, which is where Schiff didn't want to go. And we're back to that. The clock is Trump's friend right now, because he knows that the democrats won't be able to campaign as long as the trial lasts. Look for them to try to find a way to make this go away fast.If the Senate truly wants their testimony, they know how to get it, and it may mean that the democrats have to stay in session six days a week through campaign season. More likely, the democrats will capitulate and vote to make it go away so they can campaign.Look into it. While you're doing that, remember that the Senate is less hostile to the president than the House is, so they are less inclined to harass him.What makes you think the Senate would be any more effective at getting them on the stand than the House was, and what makes you think they'd be any more inclined?
Seems like testifying before an actual impeachment trial would carry some additional weight. I don't know if there's any precedent for defying that subpoena.
These are government officials. Testifying before the people's representatives is part of their duty to the American people. It's not harassment to answer questions about their actions as servants to the people.
They want testimony from a handful of people that were blocked. It won't take more than a few days to hear their stories.