On a daily basis for nearly two decades, he penned the syndicated political column titled Inside the Beltway.

[2] McCaslin began his journalism career in 1980 in Kalispell, Montana, working as news director and anchor of radio station KOFI-AM.

His cover stories for Capitol File magazine have featured Katie Couric, Katherine Heigl, Mira Sorvino, Padma Lakshmi, Kerry Washington, and Lauren Graham.

McCaslin has been a regular guest of MSNBC’s Hardball with Chris Matthews, Fox News Channel’s Fox & Friends, C-SPAN’s Washington Journal and Booknotes with Brian Lamb, National Public Radio’s Weekend Edition Sunday, and the BBC.

In 2009, McCaslin was tapped by the Talk Radio Network to be co-host of America's Morning News, syndicated to 200-plus stations around the country and featuring interviews with U.S. presidents and politicians to Hollywood elites and national sports figures.