The political ground shifted in Texas last week, and the impact of the electoral shakeup could send aftershocks across the nation for months, if not years, to come.

A wave of Republican incumbents fell to conservative challengers in the Texas House in last week’s primary run-offs, turning an already red legislature crimson and threatening the state House GOP leader’s hold on power. Those who helped lead the intra-party Texas fight now have their sights set on defeating centrist Republicans in other red states, including Tennessee, Georgia, Idaho, and South Carolina.

A concerted joint effort by Gov. Greg Abbott, outside groups, and a deep-pocketed donor flipped the seats of 14 Republicans who had opposed Abbott’s school-choice measure – a state record.

Abbott’s effort to pass school choice died last fall when 21 House Republicans – mostly from rural districts – voted to strip a voucher program out of a larger education bill. Of those 21 voucher opponents, 15 now aren’t returning. The coalition defeated six GOP incumbents in March, then three more in last week’s run-offs. Additionally, the group filled four of the five retiring Republican seats with voucher supporters, and then a voucher backer won a special election run-off.

The leading factor in these Republicans’ historic defeats hasn’t been making the most national headlines or even the most local news. It’s unrelated to Abbott’s border fight with President Biden, state Attorney General Ken Paxton’s resentment over efforts to impeach him, or even widespread local protests over the state’s skyrocketing property taxes.

Those issues all played out in the election, but school choice was far and away the most lethal campaign issue across the Lone Star state. Its impact was especially potent considering the totality of political spending and blitz of advertisements focused on school vouchers and related issues dominating the Texas airwaves and inundating inboxes.

Abbott was determined to make good on his threats to boot anti-school voucher Republicans who have blocked his ambitious crusade to give parents taxpayer-funded options to educate their children outside public schools. After several challengers he backed won their run-offs last week, the governor declared victory and announced that the House “now has enough votes to pass school choice.”

“While we did not win every race we fought in, the overall message from this year’s primaries is clear: Texans want school choice,” said Abbott. “Opponents can no longer ignore the will of the people.”

House Speaker David Phelan, who supported the effort to scrap the school voucher language from the bill last fall, managed to eke out a run-off win by less than 400 votes. But that razor-thin victory likely dooms his chances of holding onto his leadership post next year.

On the national level, Abbott is best known for his immigration showdown with President Biden, which included the deployment of thousands of Texas Guard members to shut down the border and the decision to send busloads of illegal immigrants from the southern border to places like New York, Washington, D.C., and Texas.

Texans, however, are well aware that Abbott has made school vouchers his top priority, pouring more political capital into the vouchers than any other issue in his eight years in office. The sometimes-cautious governor campaigned for reelection on the issue in 2022 and made universal education saving accounts a central theme of his most recent State of the State addresses. The ESAs would use taxpayer funds to provide parents a voucher worth $10,500 a year per student to use at a private school.

Texas teacher unions have staunchly and successfully opposed........

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