Seven candidates are seeking the Republican nomination in the primary Tuesday for U.S. Senate in Illinois, with the winner taking on incumbent Democrat Sen. Tammy Duckworth.

While many Democrats have made combating climate change a centerpiece of their campaigns, the issue often remains a low priority for many Republican candidates. Here's what the Republican candidates running for the U.S. Senate said on the issue.

Invited by Republican U.S. Senate candidate Bobby Piton, a Geneva resident, to a fundraiser in Niles, Army Lt. Gen. Michael Flynn spoke for about five minutes to a crowd of roughly 300 supporters,

Asked about national security threats and what to do to eliminate them, U.S. Senate candidate Matthew Dubeil wrote concerns over military members required to get the COVID-19 vaccine, adding, "We need to enlist new military recruits who are unvaccinated immediately."

Asked if Joe Biden won the 2020 election, U.S. Senate candidate Robert Piton wrote in his election questionnaire, "NO, He DID NOT and I have the Data and Analysis to Prove it." Read Piton's full questionnaire answers here.

Peggy Hubbard, candidate for U.S. Senate wrote of the Jan. 6 riot at the U.S. Capitol, "I was there, I know what happened. I will keep MY opinion to myself." Read Hubbard's full election questionnaire here.

The last day of candidate filings for the Nov. 8 General Election was Monday, March 14.

The candidate filing period opened Monday and closes March 14.