A report released yesterday by the Pew Research Center, which found that net migration from Mexico has dropped to zero – and may even have reversed itself – has roiled international relations and national politics. Speaking in his native Spanish, Mexico’s President Felipe Calderon called on President Obama to hurry up and finish the border fence. “We have enough problems without having to deal with hordes of gringos flooding across the Rio Grande,” he said. “It’s already hard to get our people to go up there” now that the Minuteman Project calls itself "a citizens' Neighborhood Watch on our border."

“This is just one more example of a failed Obama presidency,” said Mitt Romney. “This administration can't even provide jobs for illegal immigrants who will work for practically nothing.”

Asked if he now favored discontinuing the fence, whose cost is estimated at up to $10 million a mile, Romney responded: “I support the efforts of Gov. Jan Brewer, Sheriff Arpaio and others to secure our border.

“But,” he chuckled, “Ann and I have lost good yard boys in three states.”

The campaign quickly clarified that Romney meant to say “maintenance staff” and noted “the Romneys paid all appropriate taxes.”

Convinced he had finally found a winning issue, Newt Gingrich traveled to Arizona, where he accused Obama of maintaining the fence to keep Democratic voters from leaving.

“Mr. Obama,” he said. “Tear down this fence.”

Today the Supreme Court hears testimony on Arizona’s immigration law (SB 1070) aimed at protecting us from “the invasion of illegal aliens we face today.”