A petition filed by five voters on Thursday seeks to bar former President Donald Trump from the Illinois Republican primary election ballot in March, claiming he is ineligible to hold office because he encouraged and did little to stop the Jan. 6, 2021, attack on the U.S. Capitol.

The petition, similar to those filed in more than a dozen other states, relies on the 14th Amendment to the Constitution, which prohibits anyone from holding office who previously has taken an oath to defend the Constitution and then later “engaged in insurrection or rebellion” against the country or given “aid or comfort” to its enemies.