Glenn Beck, the popular and outspoken Fox News host, says he wants to go beyond broadcasting his opinions and start rallying his political base  formerly known as his audience  to take action.

To do so, Mr. Beck is styling himself as a political organizer. In an interview, he said he would promote voter registration drives and sponsor a series of seven conventions across the country featuring what he described as libertarian speakers.

On Saturday he held a festive campaign-style rally in The Villages in Florida, north of Orlando, in which he promoted his recently released book, “Arguing With Idiots,” and announced another book to come next August filled with right-leaning policy proposals gathered from the conventions.

Mr. Beck provided few details about his plans for the tour, making it unclear if he truly intends to prod his audience of millions into political action or merely burnish his media brand ahead of a book release.