It would actually work in favor of Republican-inclined voters, though not necessarily the party itself.
By allowing anyone to vote, Democrat candidates are incentivized to be more moderate, because a vote from a Republican is as good as another from a Democrat. Without open primaries, a Democratic-only primary pretty much decides the winner, and a candidate only has to appeal to fellow Democrats.
By allowing anyone to vote, Democrat candidates are incentivized to be more moderate, because a vote from a Republican is as good as another from a Democrat. Without open primaries, a Democratic-only primary pretty much decides the winner, and a candidate only has to appeal to fellow Democrats.