Ramos has been called the Walter Cronkite of Spanish-language media, an unparalleled nationwide voice for Hispanics. And just like the famed CBS newsman’s commentary helped turn the country against the Vietnam War, Ramos may be on the leading edge of a movement within the Hispanic media to challenge the president on immigration — a shift that some observers believe is contributing to Obama’s eroding poll numbers among Latino voters.

“When you have a Univision and a Telemundo taking an aggressive and active role pointing to the White House inaction, it calls attention,” said Jose Cancela, president of the media consulting firm Hispanics USA. “It is not helping the administration at this point in time.”

The editorials and commentary from the Spanish-language media have been brutal since April, when Arizona passed its controversial immigration enforcement law — a moment that crystallized a sense of urgency among Latinos but also underscored how little progress the White House had made on reform.