So, you want to find out whether or not you should pay attention to a pundit and/or blogger about American politics?
Here's a simple test.
Look up everything they've written about the Obama speech. Measure the amount of inches they devote to the content vs. the amount of inches they devote to "analyzing the reaction".
If you get more than a two-to-one ratio in favor of the latter, you can safely remove them from your RSS reader. They probably aren't worth the time.