President Donald Trump signed a new executive order on Sunday aimed at lowering drug prices in the United States by linking them to those of other nations and expanding the scope of a July action. The latest step, coming less than two months before the Nov. 3 presidential election, would replace a July 24 Trump executive order. It extends the mandate to prescription drugs available at a pharmacy, which are covered under Medicare Part D. The July version focused on drugs typically administered in doctors’ offices and health clinics, covered by Medicare Part B.