"Except there is not one first resurrection, pretribs tell us, there are three: Jesus' resurrection, a pretrib resurrection, and the first resurrection of Rev. 20."
...needs clarification.
Martyrs of the tribulation are part of the first resurrection, for Rev. 20:4 tells us they had...
"...not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years"
This poses a dilemma for Pretribs, for it is obvious, with martyrs of tribulation resurrected, the first resurrection can only be a post-tribulation resurrection.
They solve the dilemma by stretching the resurrection to include Jesus' resurrection and a pretrib resurrection. The first resurrection, thus being made one, inclusive of Jesus's resurrection, a pretrib one, and a post-trib one.
...needs clarification.
We know the resurrection of the Tribulation saints is not really the first resurrection...The first resurrection was Jesus and the souls of the OT saints who were released from Abraham's Bosom...
We also know of the resurrection of the souls of the martyred (only) saints of the Tribulation in Rev. 20...These saints are resurrected AFTER the marriage takes place in heaven...
So that leaves the Bride who got married in Rev. 19...There are 3 resurrections all of whom are saved and translated into the Kingdom of Heaven; the physical kingdom where Jesus will reign for a thousand years...
The first resurrection then comprises (completes) all who have been saved as opposed to those who come up in the 2nd resurrection at the White Throne Judgment...