You must not be familiar with basic election laws. Campaigns are prohibited from accepting or soliciting anything of value from foreign nationals. I guess you can argue that opposition research is of no value, but it’s awfully curious that Trump Jr. would be so enthusiastic (“I love it”) about getting something that had no value.

I’ve seen some legal experts questions whether the law is unconstitutional and others question whether Trump Jr. was offered anything of value, but it’s undoubtedly a law.