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.