Apparently the audience was stacked with NR readers. A couple of e-mails:

Mr. Lowry,
We have never been introduced, so I found it surprising that you would refer to me as a “Bubba.” Yes, I was one of those “Bubbas” who was in the audience listening to the President yesterday. And, I knew a lot of the others there. They are savvy about politics, immigration issues, and probably many of them (like me) have been reading NR since before you were born.
Please leave the habit of calling others names to the opposition.
Personally, I think the big story there was the tepid response when Senator McCain was introduced and the thunderous applause when Senator Kyl was introduced…
Good morning Mr. Lowry:
You are correct that conservatives (and people in general) are not stupid about what the President is trying to accomplish with the temporary worker plan. I was in the audience during the President’s Tucson speech. Whenever he would talk about the plan a great many people would mutter “no” and shake their heads. Listening to the conservations in the crowd I take it as the consensus opinion that the temporary worker plan is simply an amnesty in waiting. I am a strong supporter of this President, yet I felt embarrassed for him when he stood up there and attempted to hoodwink a bunch of people who knew better. I also came away from the event convinced that the Republican party is not evenly split on the issue of immigration. I feel that the vast majority of party members are against an amnesty/temporary worker plan. In fact I don’t really know who in the party is for it.