Does it seem unusual to you that the press is now trying to determine what's true and what's false in intelligence dossiers, originated by foreign operatives, for which no one can be sure of the identities of the original sources, let alone their credibility?
That's not because no such dossiers existed before Donald Trump came along. Far from it. Intelligence operatives - whether state-sponsored of independent and working on behalf of political players (or others) - have been compiling such dossiers on public figures since such things were possible. Anyone who has ever covered politics - myself included - has probably been approached at some point by some character claiming to have the explosive goods on this, that or the other guy.