Texas GOP turbocharges immigration fight as races tighten

AUSTIN, Texas — As polls show narrowing national races in Texas, and as the flow of migrant crossings at the Mexican border has slowed, Republicans and Democrats are pivoting on their immigration strategies.

Republicans have focused recently on sweeping and unproven allegations of widespread voting from immigrants who are living in the country illegally — which Texas Attorney General Ken Paxton (R) has repeatedly cast as part of a grand Democratic plan to “fix” the U.S. as “one-party...