MADISON, Wis. (AP) – Voters are trickling into to the polls to cast ballots in the Wisconsin Supreme Court primary.  Marquette University law professor Ed Fallone and lemon law attorney Vince Megna are trying to unseat Justice Pat Roggensack. The top two vote-getters Tuesday will advance to the April general election.        Turnout on Tuesday was predicted to be less than 10 percent.  Fifty-eight-year-old Mitch Wiersema was one of just a handful of voters who found their way to a Sun Prairie polling site. He says he voted for Fallone because he believes Roggensack is trying to advance a conservative agenda.   Forty-three-year-old David Rogman of Milwaukee said he voted for Roggensack. He says he thinks Roggensack is fair-minded and doesn’t try to legislate from the bench.