The 7th U.S. Circuit Court of Appeals became the latest court to reject a local attorney’s suit alleging she was wrongly removed from the 2018 primary ballot for Cook County clerk.Jan Kowalski McDonald said she plans to pursue another appeal — this time to the U.S. Supreme Court.Ever since election officials struck her candidacy, McDonald has asserted the requisite number of valid signatures to be placed on the Democratic Party ballot — 8,236 — was unconstitutional.She sought a court order that …