All 67 of Illinois' delegates to the Republican National Convention will be bound to Presidential Candidates based on the results of today's Illinois Presidential Primary.
54 National Convention District delegates are elected in a so-called "Loophole" primary (a Delegate Selection Primary combined with an Advisory "beauty contest" presidential preference vote). Each candidate for [District] delegate ... must file a Statement of Presidential Preference supporting a specific presidential candidate, or a statement that he/she intends to run uncommitted [SBE No. P-1E]. District delegates are directly elected by the voters and individually listed on the ballot with their presidential preferences indicated.
10 National Convention Statewide Delegates are bound winner-take-all to the candidate receiving the largest number of votes statewide. These delegates do not appear on the ballot and are chosen at the State Convention.
The 3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Illinois Republican Party, will attend the convention, by virtue of their position, bound winner-take-all to the candidate receiving the largest number of votes statewide.