(CBS) — With the presidential race grabbing most of the headlines, it’s easy to forget there are many other important races on Tuesday’s Illinois primary ballot.

WBBM Political Editor Craig Dellimore takes a look at some key races in the suburbs.

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Perhaps one of the top contests is the race to replace Democratic 8th District Congresswoman Tammy Duckworth, who’s running for the U.S. Senate. Businessman Raja Krishnamoorthi, Villa Park Mayor Deb Bulwinkle and Elgin State Senator Michael Noland are vying for the Democratic nomination.

The Tenth District race pits Highland Park Mayor Nancy Rotering and former Congressman Brad Schneider in the Democratic battle for the death now held by Republican Bob Dold.

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In the 14th District Republican Congressman Randy Hultgren will wait to see which of three lesser known Democrats faces him in that overwhelmingly Republican area.

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The Republican primary is where the action is in the 11th District, where DuPage County Board Member Tonia Khouri faces physicist Herman White and cardiologist Nick Stella. The winner will face Democratic Congressman Bill Foster.

In McHenry County, voters will make history. This will be the first time they’ll elect a County Board chairman instead of having one picked by the board. Incumbent Joseph Gottemoller is facing fellow Crystal Lake Attorney Michael Walkup in the Republican Primary.

In Kane County, incumbent County Board chairman Chris Lauzen faces a GOP primary challenge from St. Charles Republican Party Chairman Ken Shepro.

In Lake County, State Senator Dan Duffy’s decided to retire. The republican race to replace him includes Dan McConchie, whom Duffy’s endorsed, Barrington Hills Village President Martin McLaughlin and Mettawa Mayor Casey Urlacher, the brother of Bears legend Brian Urlacher.

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DuPage County voters will be nominees in their party’s races for County and Forest Preserve Boards. The Roselle Elementary School District and Winfield Fire Protection District are asking for tax increases to improve services.