Some Republican politicians called a 10-year-old rape victim's story was a lie. Now, they're shifting the focus to immigration.

When the story of a 10-year-old rape victim crossing state lines for an abortion drew widespread attention earlier this month, some Republican politicians and news outlets dismissed it as a hoax.

In a now-deleted tweet, Republican Rep. Jim Jordan wrote: "Another lie. Anyone surprised?" Jordan had quoted a story about Ohio Attorney General Dave Yost's office initially stating it hadn't found any evidence to support the rape charge. Yost had also originally dismissed the story as a "fabrication."

The story initially drew skepticism because of a lack of details released to the public. But when...