President Bush discussed his policies with conservative radio hosts last month at the White House, including, from left, Mike Gallagher, Neal Boortz, Laura Ingraham, Sean Hannity and Michael Medved. WASHINGTON, Oct. 16 — On an overcast Friday morning last month, White House aides ushered an influential group of conservative radio hosts into the Oval Office for a private audience with the president. For an hour and a half, Mr. Bush discussed his case for the war in Iraq, his immigration proposals and even the personality of his Scottish terrier Barney, who scratched on the door during the session until the...