After sending more than 13,000 Twitter messages in less than three years, Jon Feere, an outspoken opponent of illegal immigration, suddenly went silent after Inauguration Day.

As a legal policy analyst at the Center for Immigration Studies, a Washington-based group that favors significant reductions in immigration, Mr. Feere had staked out tough positions on the subject, including pushing for an end to automatic citizenship for children born in the United States….

Read more in The New York Times.