65 ILCS 5/4-8-2
A candidate for nomination or a nominee for any office to be filled by a popular election under this article who, directly or indirectly, enters into any understanding or agreement to do or not to do any official act in the event of his election to the advantage of any person in consideration of the influence, support, or assistance of that person to aid in the nomination or election of the candidate or nominee, is guilty of giving, or offering to give, a bribe, and if convicted thereof shall be guilty of a Class C misdemeanor. If elected to office, a conviction under this section shall effect a forfeiture of the office. However, this section shall not prevent any candidate for nomination or nominee from publicly outlining his position or pledging his support for, or opposition to, any measure or prospective measure of a public nature.
65 ILCS 5/4-8-2