“Everyone wants to make a racial issue out of it, ‘Ooh, the white replacement theory,’” Mr. Carlson went on. “No, no, no, this is a voting rights question. I have less political power because they are importing a brand-new electorate. Why should I sit back and take that? The power that I have as an American, guaranteed at birth, is one man, one vote. And they are diluting it.” The A.D.L. letter, signed by Jonathan A. Greenblatt, the Jewish advocacy group’s chief executive, said that the language by Mr. Carlson “was not just a dog whistle to racists — it was a bullhorn.” “This is not legitimate political discourse,” read the letter, addressed to Suzanne Scott, the chief executive of Fox News. “It is dangerous race-baiting, extreme rhetoric And yet, unfortunately, it is the culmination of a pattern of increasingly divisive rhetoric used by Carlson over the past few years.”