Willens/APLou Dobbs talks to Bill O'Reilly on

Former CNN veteran Lou Dobbs suggests his form of advocacy journalism fell out of favor when President Obama was elected and his ratings began to decline.

Dobbs, who had come under fire from watchdog groups because of his on-air, anti-immigration stance, told Bill O'Reilly Monday on the Fox News Channel that he never heard directly from CNN management that he made the network look bad - but there was a tonal change when Obama became President.

"You know, I discern more of a difference between then, which was under the Bush administration whom I was criticizing, and now, when it is the Obama administration and an entirely different tone was taken," Dobbs said.

Dobbs abruptly resigned from CNN last week after agreeing that he could no longer operate under CNN's push to avoid airing anchor opinions in prime time.

As for the future, Dobbs reiterated he's going to take his time. " I'm going to remain - I can guarantee you 100 percent - I'm going to remain in the in the public arena," Dobbs said.

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