Team Mueller indicted a bunch of Russians associated with a troll farm for interfering with an election in the United States. Russian troll farms generally don’t follow United States law. But foreigners are not allowed to interfere with elections in the United States. Unless they’re named Christopher Steele.
The Clinton campaign employed a British foreign agent who used Russian intelligence sources to put together opposition research meant to interfere with the results of a United States election. Collusion between the Clinton campaign, Steele and the Russians doesn’t require an endless fishing expedition.