WASHINGTON – Severely wounded and still recovering, former Rep. Gabrielle Giffords begged lawmakers at an emotional hearing Wednesday to act quickly to curb firearms because “Americans are counting on you.” Not everyone agreed, underscoring the national political divide over gun control.

Giffords’ 80-word plea was the day’s most riveting moment, delivered in a hushed, halting voice two years after the Arizona Democrat suffered head wounds in a Tucson shooting spree that killed six people. The session also came two months after 20 first-graders and six women were slain by a gunman who invaded Sandy Hook Elementary School in Newtown, Conn.

At the same hearing, a top official of the National Rifle Association rejected Democratic proposals to ban assault weapons and high-capacity ammunition magazines and said requiring background checks for all gun purchases would be ineffective because the Obama administration isn’t doing enough to enforce the law as it is.