I would doubt that this is as big a part of the story as you people are making it out to be.
His father, Barr McClellan, did work as a young lawyer for the Austin, TX based law firm headed by Ed Clark, who was possibly LBJ's most trusted confidant. But the elder McClellan was a junior guy there, and was not really part of the inner circle at the firm. He eventually left the firm after a dispute with Clark, suspecting from the buzz there that there was nefarious business going on between the firm and LBJ for many years.
Barr McClellan made a splash in 2003 with the publication of the book "Blood, Money and Power", which made a strong argument for LBJ's involvement in plotting the JFK assassination. It also links LBJ to a couple of previous politically motivated murders. IIRC, it is based on McClellan's personal experiences with Clark's firm and extensive independent research by the author. It so happened that his son Scott was Bush WH press secretary at the time his father's book came out. When asked about it, Scott simply declined comment.
Yes, Barr McClellan was a Democrat back in the 60s and early 70s, but so was just about anyone who was anybody in the state of Texas at the time. I wouldn't be certain that he's still a Democrat today, in view of his experiences with Clark and with LBJ himself in the latter's final days. BTW, Barr McClellen now lives in Mississippi.
In the meantime, Scott McClellan has been reported to be estranged from his father for quite some time. His parents divorced many years ago, and Scott's mother once held an appointed position in Texas state government under a GOP state administration. So I believe his mother is a Republican.
Please see my post # 111.
Thanks for the information.
His mother is an unprincipled political whore who switches parties (and husbands) like the change in the wind. Starting out as a liberal rodent Mayor of Austin, Carole Stewart Keeton McClellan Rylander Strayhorn then moved over to the GOP to try to win more offices, first Congress, then TX Railroad Commissioner (where she claimed to discover Conservatism), then over to Comptroller, and then going RINO again and deciding to run for Governor as a liberal alternative to the current incumbent. Junior only got his job because of his mama, and you can see how the little ingrate repaid his betters.