I was going through the new Republican Party Rules, and I noticed something: all Republican primaries held before March 15 must be proportional, although a “winner take all” threshhold of 50% or higher may be set. This means that California, which has moved its Presidential primary from June to Super Tuesday (March 3, 2020), is no longer Winner Take All.
The question is, who does it hurt more - Trump, or, considering that California is where you would expect a more moderate candidate to do well, his potential opponents (and yes, I think there will be a viable attempt to primary him out)?
(BTW, although California is otherwise an “open primary,” only registered members of a party may vote in that party’s Presidential primary. This dates back to, I think, 2000, when non-Republicans could vote in the California Republican Presidential Primary, but since Republican party rules said that the primary would be void if any non-Republican votes were counted, the state released separate “total” counts, which were treated as a straw poll, and “Republican voter” counts, which were used to determine the state’s delegates.)