[5] He is heard daily in New York City, Los Angeles, Chicago, Dallas, Houston, Detroit, Atlanta, and Philadelphia as well as in small, medium and major markets all over the country.

Talkers Magazine has named Gallagher one of the 100 most influential talk hosts in America for eleven consecutive years.

[7] Gallagher's show hosts many high-profile politicians as guests, including former Speaker of the House Newt Gingrich, former US President George W. Bush,[8] Speaker of the House John Boehner,[9] Republican presidential candidate John McCain during his 2008 electoral run,[10] Vice President Dick Cheney while in office,[11] and then-Secretary of Defense Donald Rumsfeld.

The Times reviewed the book writing, "You might disagree with the man's politics, but dang, you gotta love a guy who slaughters a steer live on the radio just to annoy the ideologues at People for the Ethical Treatment of Animals, then gives the meat to the poor.

"[14] On his radio show, he announced he was writing a book called 50 Things Liberals Love to Hate which was released August 28, 2012.

[16] On May 8, 2006, Gallagher used his show to raise money for the creation of homes in poverty-stricken areas of Jamaica in conjunction with Food for the Poor, during a live broadcast in the Jamaican national capital.

With this gesture being accused of being blood money, the syndicated radio host gave the church an hour to appear on air.

In December 2006 Gallagher made a controversial comment on Fox News, in response to a discussion of whether film actors and television personalities should be held to account for public statements they make against the government in a time of war, specifically Joy Behar's comparison of then Secretary of Defense Donald Rumsfeld to Adolf Hitler.

[23] From September 6-11, 2011, Gallagher made a week-long cameo in the Broadway show Memphis, stating it was the culmination of a lifelong dream.