That includes state Reps. Ron Sandack of Downers Grove and Ed Sullivan of Mundelein — two of three GOP members of the House to vote to legalize same-sex marriage last fall.
The third, state Rep. Tom Cross, is making a bid for state treasurer.
Sandack is facing Downers Grove teacher Keith Matune in the March 18 primary. Sullivan faces Mundelein bus driver Bob Bednar.
Both opponents have received campaign help from interest groups that maintain marriage should only be between a man and a woman.
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