Name:   PTClakefan - Subject:   Lol, too funny Date:   1/24/2020 8:08:22 AM

Well the short and obvious answer is their testimony is unnecessary and is an obvious delay tactic designed to keep the impeachment proceeding alive as long as possible.  The "best evidence" of what was said on the call between Trump and Zelensky (i.e. the official transcript) is already available to them and everyone else. The democrats know that if they push for testimony from Bolton and Mulvaney, and convince the Senate to allow it, Trump and his legal team will (justifiably) assert executive privilege. This will result in protracted litigation likely to last for several months in a best case scenario thereby keeping the matter alive and in the publics mind during the election.  It will likely take the SCOTUS to resolve it, which even under an expedited review process, will take several months at best.

And, as luck would have it, it also gives them a great talking point about what the Trump administration is "hiding" and attempting to "cover-up" while this matter percolates up through the the federal judiciary.  On the other hand, if the Trump administration capitulates and allows them to testify, which is very unlikely, it will not end there.  They will keep digging and digging in search of finding that Rosemary Woods moment.  In a close election, this would be like playing with house money for the dems.  Thus, this isn't some quixotic quest for the truth, and it doesnt really take a genius to figure that out.