The insulin cap is a long-held ambition of Democrats, who want it to apply to patients with Medicare and private insurance. Republicans left untouched the portion applicable to Medicare patients, but removed the cap on insulin for other patients. Bipartisan talks on a broader insulin pricing bill collapsed earlier this year. The Senate lawmaker ruled that the Democrats’ cap, included in the Inflation Reduction Act, did not comply with rules that allow them to advance a bill under the process known as reconciliation – a tactic that helps them prevent a GOP split. That gave Republicans an opening to reject it.