As we saw with the Steele dossier that does not seem to matter theses days in politics. Just enough smoke and depending on the side you are on - there must be a fire somewhere
The difference being that the Steele dossier wasn't, in itself, being quoted as proof of malfeasance. It informed an FBI investigation which did conclude that there was Russian interference in the 2016 election and that the Trump campaign used information obtained from foreign sources. (Something which
all of the intelligence agencies agree happened.)