Deep-pocketed Republican groups are pouring millions into efforts to knock off hard-right GOP primary candidates — while ensuring the source of the cash stays shrouded until after voters select their nominees, Axios has learned.
Why it matters: Through "pop-up" super PACs, frequently branded with local-sounding or vaguely ideological names, Republican operatives in Washington can try to tip the scales of key intra-party fights without leaving any fingerprints.
