AXIOS (Andrew Solender) - Inside the growing firestorm over House Democrats' meddling in their own primaries
The Democratic Congressional Campaign Committee is baffling fellow Democrats by pouring money into yet another competitive House primary — this time in Arizona. Why it matters: The DCCC has racked up a spotty record in its attempts to intervene in Democratic primaries this cycle, leading some House Democrats to question why they're paying dues to the campaign committee. - Rep. Adelita Grijalva (D-Ariz.), who previously criticized the DCCC for intervening in California, told Axios she is "frustrated" to see the practice in her own backyard. - Another House Democrat, speaking on the condition of anonymity to criticize leadership, told Axios, "The DCCC's endorsement, I think, hurts the message." State of play: Two primary candidates in…