It’s pretty much common knowledge at this point.
The GOP slow walked and blocked investigations for 3 years to push the big obamagate issues up as close to the election as possible to:
1)Have a plausible reason not to prosecute
2)Lesson the chance of GOPe accountability for their of support of spygate/Mueller’s police state due to the fact nobody wants an intraparty brawl now.
3)extort Trump voters support down ballot for useless GOPe candidates like Graham.
Many of them were hoping it would be successful in removing President Trump.