Must-read WaPo:

But there’s another reason McGahn may have been willing to work for Trump.

Shortly after McGahn started at Jones Day he picked up a new client: Aaron Schock, the congressman who was then reeling from a scandal involving the misuse of federal funds and has since left office. To this day, according to FEC reports, Schock has still not paid Jones Day the nearly $750,000 he owes them. (Jones Day representatives also did not return calls.)

Getting stiffed by Schock put McGahn in a difficult position with his new law partners, said a Republican strategist who has worked him. “He had this huge hole to fill. And when Trump came along, he was under a lot of pressure by management to fill that hole….

Then there’s Benjamin Ginsberg, the preeminent election lawyer in the country and McGahn’s mentor and Jones Day co-worker. Ginsberg, who made his name in 2000 arguing the Republican side in Bush v. Gore, started the election cycle working for Gov. Scott Walker. He now spends much of his time on MSNBC helping explain delegate counts and convention scenarios to a bewildered electorate.

Mr. Ginsberg: Is it ethical to go on television and discuss the 2016 election while the GOP front-runner shovels money into your firm’s coffers? When you outline the convention strategies other candidates might take to wrestle the nomination from Trump, do you not worry about offending your own firm’s billionaire client?

Nope, says Ginsberg: That’s just not how these big law firms work.

“We work together, but we also have walls,” he said, and Jones Day has built “a big, beautiful wall” for the presidential election.