A new Chicago Tribune poll has former Secretary of State Hillary Clinton and businessman Donald Trump leading the Illinois presidential primary elections.

Illinois voters are heading to the polls next week on March 15. Early voting began last week and runs through March 14. 

Clinton has a massive 42 percent lead over U.S. Sen. Bernie Sanders (I-VT), garnering 67 percent of voters' support compared to the senator's 25 percent. On the Republican side, Trump has a 10 percent edge over the second place candidate in the poll, U.S. Sen. Ted Cruz (R-TX). Trump received 32 percent of likely voters' support, while Cruz had 22 percent of the backing of poll respondents. U.S. Sen. Marco Rubio (R-FL) came in at a very close third at 21 percent and Ohio Gov. John Kasich had 18 percent of the poll takers' support.

The poll of 600 registered voters was conducted from March 2 through March 6 and has a margin of error of 4.1 percent.