This may take some time.
We have to start with St Sen (and failed GOP cand. for PA Gov) Doug Mastriano.
Doug gets big mentions in the section of the report focusing on the fake electors (p. 276-277):
The concept of State legislators appointing their own electors featured prominently in a series of hastily arranged official and unofficial “hearings” with State legislators that the Trump team announced on November 24, 2020. On November 25th, President Trump called in to an unofficial meeting with legislators in Gettysburg, Pennsylvania. The meeting was set up to appear like an official hearing, but it was not. It took place in a hotel ballroom, and those presenting arguments or purported evidence, like Giuliani, Jenna Ellis, and others, were not placed under oath. According to President Pro Tempore of the Pennsylvania Senate Jake Corman, he had initially been asked by State Senator Doug Mastriano to hold a hearing about the election. Corman responded that any formal hearing should be official, with sworn testimony, and open to both parties. That was not what Senator Mastriano ultimately convened.
No, it wasn't.
Afterwards:
President Trump invited some of the lawmakers to come meet him at the White House that evening and, according to Giuliani, it was “a large group” that went. Special Assistant to the President Cassidy Hutchinson’s text messages with Kerik included the guest list and descriptions of the vehicles that would need access to the White House grounds. Pennsylvania State Senator Doug Mastriano drove one car, a hired driver drove a van with most of the State legislators, and Kerik drove an SUV with attorney Katherine Friess and election-conspiracy proponent Phil Waldron. Hutchinson estimated that at least 29 visitors traveled from Pennsylvania to the White House that day, and she explained that their conversation with the President touched on holding a special session of the State legislature to appoint Trump electors.Doug drove to DC?
That would be the day that this happened:
A Pennsylvania state senator abruptly left a West Wing meeting with President Donald Trump after being informed he had tested positive for the coronavirus, a person with direct knowledge of the meeting told The Associated Press on Sunday.
Republican state Sen. Doug Mastriano had gone to the White House last Wednesday with like-minded Republican state lawmakers shortly after a four-hour-plus public meeting that Mastriano helped host in Gettysburg — maskless — to discuss efforts to overturn president-elect Joe Biden’s victory in the state.
Trump told Mastriano that White House medical personnel would take care of him, his son and his son’s friend, who were also there for the Oval Office meeting and tested positive. The meeting continued after Mastriano and the others left, the person said.
Big day for Doug - take part in events leading to an attempted coup, expose his son (and his son's friend) to a deadly virus. You know. The usual for a science-denying insurrectionist.
If there was any doubt how deeply Doug was involved, they're wiped away a few pages later (p 293-294):
While many State officials resisted President Trump’s demands, some eagerly joined the President’s efforts.
President Trump routinely coordinated with Pennsylvania State Senator Doug Mastriano, whose request led to the November 25, 2020, hotel “hearing” in Gettysburg, and who traveled to Washington to meet with the President afterward. Senator Mastriano, who would later charter and pay for buses to Washington for the President’s “Stop the Steal” rally on January 6th and was near the Capitol during the attack, quickly rose to favor with the President.
Trump routinely coordinated with Mastriano.
So how routine was this coordination between Trump and Mastriano?
This much (p 294-295):
On November 30th, President Trump called Mastriano, interrupting him during a radio interview and telling listeners that “Doug is the absolute hero” and people are “really angry in Pennsylvania.”
On December 5th, Senator Mastriano sent an email to President Trump’s executive assistant, Molly Michael, with a Supreme Court Amicus Brief for the President that the pair “discussed yesterday,” related to a case brought by Representative Mike Kelly (R–PA) against his own State, which the Supreme Court rejected just a few days later.
On December 14th, President Trump’s executive assistant sent Mastriano an email “From POTUS” with talking points promoting a conspiracy theory about election machines.
And on December 21st, Mastriano sent another email for President Trump, in which he wrote: “Dear Mr. President—attached please find the ‘killer letter’ on the Pennsylvania election that we discussed last night” that “I only just completed.” This letter recapped the Gettysburg hotel hearing on November 25th, and claimed that “there is rampant election fraud in Pennsylvania that must be investigated, remedied and rectified.” President Trump sent that letter to John Eastman, Acting Attorney General Jeffrey Rosen, Acting Deputy Attorney General Richard Donoghue, Rush Limbaugh, former Florida Attorney General Pam Bondi, Lou Dobbs, and others.
Only there was no fraud.
Then there's this - which was new to me (p-295):
As January 6th approached, Senator Mastriano’s involvement in attempts to overturn the election only grew. On December 23rd, he led a second group of Pennsylvania State senators for a meeting with President Trump in the Oval Office, which Giuliani claimed “swayed about 20” of them. Neither Speaker Cutler nor Senate President Corman participated.A second meeting in the Oval Office? Who were they?
Then on January 5, this happened:
State Senator Doug Mastriano (R-33) took the official oath of office today and began serving his second term in the Pennsylvania Senate, representing residents of Adams, Franklin, Cumberland and York counties.
That would be this oath:
I do solemnly swear that I will support, obey and defend the Constitution of the United States and the Constitution of this Commonwealth and that I will discharge the duties of my office with fidelity.
And yet from the report (pg 295):
On January 5th, President Trump spoke again with Mastriano and then notified the White House operator that Mastriano “will be calling in for the Vice President” soon. That evening Senator Mastriano sent two more emails for the President. One was a letter addressed to Vice President Pence on behalf of nearly 100 legislators from various States; the other was a letter directed to McConnell and McCarthy from Pennsylvania lawmakers, this time asking Congress to postpone acting on the 6th. President Trump tweeted the letter that night, captioning it “BIG NEWS IN PENNSYLVANIA!” and, after midnight, he retweeted that “Pennsylvania is going to Trump. The legislators have spoken.” As described elsewhere in this report, that letter, and letters like it, were used in the effort to convince Vice President Pence that he could and should affect the outcome of the joint session of Congress on January 6th.
Oath betrayed.
Let's stop there.