NEW YORK – Glenn Beck returns to Fox News Channel on Monday after a vacation with fewer companies willing to advertise on his show than when he left, part of the fallout from calling President Barack Obama a racist.

A total of 33 Fox advertisers, including Wal-Mart Stores Inc., CVS Caremark, Clorox and Sprint, directed that their commercials not air on Beck’s show, according to the companies and ColorofChange.org, a group that promotes political action among blacks and launched a campaign to get advertisers to abandon him. That’s more than a dozen more than were identified a week ago.

While it’s unclear what effect, if any, this will ultimately have on Fox and Beck, it is already making advertisers skittish about hawking their wares within the most opinionated cable TV shows.

The Clorox Co., a former Beck advertiser, now says that “we do not want to be associated with inflammatory speech used by either liberal or conservative talk show hosts.” The maker of bleach and household cleaners said in a statement that it has decided not to advertise on political talk shows.

The shows present a dilemma for advertisers, who usually like a “safe” environment for their messages. The Olbermanns, Hannitys, O’Reillys, Maddows and Becks of the TV world are more likely to say something that will anger a viewer, who might take it out on sponsors.

“This is a good illustration of that conundrum,” said Rich Hallabran, spokesman for UPS Stores, which he said has temporarily halted buying ads on Fox News Channel as a whole.

Beck can bring the eyeballs. With the health care debate raising political temperatures, his show had its biggest week ever right before his vacation, averaging 2.4 million viewers each day, according to Nielsen Media Research.

ColorofChange.org quickly targeted companies whose ads had appeared during Beck’s show, telling them what he had said and seeking a commitment to drop him. The goal is to make Beck a liability, said James Rucker, the organization’s executive director.