WASHINGTON (AP) — Actions by the Trump administration are triggering double-digit premium increases on individual health insurance policies purchased by many people, according to a nonpartisan study.

The analysis released Thursday by the Kaiser Family Foundation found that mixed signals from President Donald Trump have created uncertainty "far outside the norm" and led insurers to seek higher premium increases for 2018 than would otherwise have been the case.

Republicans in Congress have not delivered on their promise to repeal and replace the Obama-era Affordable Care Act. Trump is insisting...