The crypto industry’s campaign-finance juggernaut, the Fairshake political action committee, backed winners in half a dozen Southern primaries on Tuesday, pouring millions of dollars into the races as one of the congressional midterms elections’ leading spenders.

The super PAC deployed more than $20 million in political advertising in three states, mostly to Republican candidates who are considered likely to win their deep-red regions in the November general elections. So far this year, Fairshake — which has in previous election cycles helped get dozens of pro-crypto candidates to Washington — has backed a lengthy list of primary winners, though it did experience some setbacks, most notably in the Illinois race in which it spent more…