> > They are interested in learning about topics from credible people

> Honestly, you surprised me with this statement alone. interested in learning? > do you think Trump wants to learn anything from AIPAC? > or Pharma lobby or Military Industrial complex?

Trump is unusually sure of himself. But no man rules alone: There is a massive org under every president trying to run a government. I know for a fact that people two levels of management under Trump (i.e. Trump is their manager's manager) do take meetings with people who lobby on the issue of health care policy and (for and against) military procurement. I would be shocked if people who are for/against working with Isreal are never in a room with anyone who can set policy.

Imagine that it is your job to come up with policy for a bug expensive government program: The VA hospital system, a military procurement program that buys airplanes, the part of the state department focused on MENA, etc. If someone asks to meet, claiming that they did academic/technical work which shows you can get a better result with a policy change, you will take that meeting. Examples:

  1. An MD researcher shows you can cut drug costs by switching one medication for another.

  2. An engineer has reason to believe current stealth coatings on fighter planes won't work against China's missiles in 5 years.

  3. An economist thinks that an ally (Isreal, Korea, etc.) have demographics that will stop them from being able to field an army within 20 years.

You should go into these meetings with skepticism, and there is a 90%-99% chance the person's idea is bad. But if an idea is good/correct/important, and you blew him off, your boss will be angry, and your career will be over.

Most people in government want to solve problems (and get credit for doing so). Most problems governments face have hard tradeoffs that voters don't understand/care about. Voters want unlimited healthcare at no cost to themselves, 100% success thwarting terrorists with no spying on citizens, military supremacy without paying much for weapons, etc. People asked to solve these problems are DESPERATE for new ideas to allow voters to see that they are getting good outcomes. Telling them you have a way around a hard tradeoff is music to their ears.