WASHINGTON (AP) — The Senate has approved a bill aimed at easing the baby formula shortage for families participating in a government assistance program known as WIC. That program accounts for about half of all formula purchases in the U.S. The House had passed the bill the day before, so it now goes to President Joe Biden to be signed into law. The vouchers can generally only be used to purchase one brand of infant formula, which encourages the manufacturer to offer big discounts to secure a state’s business. The bill makes it possible for families to redeem the WIC vouchers for whatever formula brand is available.