Jack Betts says Democrats, Republicans and Libertarians benefited from straight-ticket voting.
Democrats represent 46 percent of registered voters, but drew 58.8 percent of straight ticket votes. Republicans represent 32 percent of voters, but drew 40.4 percent of straight ticket votes.
This is not quite the same as saying that all those straight-party Democratic ballots were cast by Democrats, or that all those Republican straight-party ballots were cast by Republicans. There may have been a number of straight-ticket ballots cast by unaffiliated voters, who make up 22 percent of the state's registered voters. And of course there might have been some crossover straight tickets, too.
He also notes that the 19,054 Libertarian straight-ticket ballots far outnumbere the 3,683 registered Libertarian voters.