Jared did not "sell visas to rich Chinese" but he did sell investments that allow for a EB-5 visa to be attached to them.  That 'selling of America' began in 1990. Jared had a job. His job involved foreign governments.

But the investigation would be remiss if they did not look at everyone. 

That 'looking at everyone' should include two of Jared's 2015 business partners, George Soros and Goldman Sachs.  This investigation is gonna get very interesting I think!
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The Visa: EB-5 
https://www.uscis.gov/eb-5