Democratic Lake County Judge Elizabeth M. “Liz” Rochford and 3rd District Appellate Justice Mary K. O’Brien were sworn in to the Illinois Supreme Court hours apart Monday, beginning 10-year terms after winning heated partisan contests.Rochford defeated former Lake County Sheriff Mark Curran in the November election for 2nd District spot covering the northern collar counties.O’Brien, a Democrat, defeated Republican Justice Michael J. Burke to join the court from the 3rd District, which covers the …