Most of the immigrants targeted by federal authorities in California this week for alleged voter fraud had applied for U.S. citizenship and now face charges related to lying on forms or during interviews. Those charges could lead to years in prison and thwart their efforts to naturalize.

The Trump administration is escalating its fight with California ahead of next month's midterm election, warning that local officials who process and tabulate ballots submitted by suspected noncitizen voters are putting themselves at risk of criminal investigation and potential prosecution.