February 21, 2017 -- Continuing the trend since the passage of Proposition 14 in 2010, Democrats spent significantly more than Republicans on same-party races in the 2016 election cycle. Proposition 14 modified the way non-Presidential elections are conducted in California, creating an open primary between candidates of all parties followed by a run-off between the top two vote-getters. 

In 2016, Democrats raised or spent $91.5 million on 23 same-party races in the State Assembly, State Senate, and U.S. House of Representatives, with an average budget of $3.97 million per race. In comparison, Republicans raised or spent $2.78 million on four same-party races this cycle, averaging just under $700,000 per race. Notably, Republicans only ran against each other in the State Assembly; there were no races between Republicans in either the State Senate or the US House of Representatives. 

Over the three election cycles since Prop. 14 has gone into effect, Democrats have raised or spent $195 million on a total of 59 same-party races, while Republicans have spent $34.5 million on just 20 races.

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