You’re correct that collaboration with Russia--emoluments--is the real actual issue that needs to…
Christopher Poff

Johnstone is the one who’s mistaken. Trump Jr. was willing to accept opposition research from a representative of the Russian government. When Christopher Steele compiled the dossier based on information gathered from Russian contacts, he was so alarmed, he turned it over to the FBI. 
If Trump Jr. had done that, he wouldn’t be in legal jeopardy now.