Here's a site some may find of interest re: H1B:
https://www.citizen.org/article/big-tech-lobbying-update/
He says it, right here:
“I can tell you [political spending] plays an important role. Not because the checks are big, but because the way the political process works. Politicians in the United States have events, they have weekend retreats, you have to write a check and then you’re invited and participate.
“So if you work in the government affairs team in the United States, you spend your weekends going to these events; you spend your evenings going to these dinners, and the reason you go is because the PAC writes a check.
“But out of that ongoing effort a relationship evolves and emerges and solidifies … I’m sometimes calling members and asking for their help ongreen cards, or on visa issues …Or the issues around national security, or privacy …
“There are times when I call people who I don’t personally know, and somebody will say ‘you know, your folks have always shown up for me at my events. And we have a good relationship. Let me see what I can do to help you.’”