Something is off about those listings. The majority of the transactions went to "Brian Forde for Congress" and have the memos like " .03533216 BITCOINS SOLD VIA COINBASE - PURCHASER UNKNOWN". I don't think these are contributions by Coinbase, but Bitcoin contributions that went through Coinbase. There is probably some byzantine election funding rule that allowed or forced these recipients to list Coinbase as the"source" of anonymous Bitcoin donations.