PHOENIX (AP) — Arizona was already expected to be one of the most closely contested states in November’s U.S. presidential election. But a ruling this week instituting a near-total abortion ban supercharged the state’s role, transforming it into perhaps the nation’s most critical battleground.

This Sunbelt state with a fierce independent streak has long been at the forefront of the nation’s immigration debate due to its 378-mile border with Mexico and its large Hispanic and immigrant populations. It now moves to the center of the national debate over reproductive rights after the U.S. Supreme Court ended a federally guaranteed right to abortion.

Abortion and immigration have been two of this year’s biggest political issues. No battleground state has been affected more directly by both than Arizona.

“Do not underestimate this,” Democratic pollster John Anzalone, who polls for President Joe Biden’s reelection campaign, said of the Arizona abortion ruling. “It’s dynamic-changing.”