Why would a Republican, any Republican, object to lowering taxes for middle America? If as postulated, tax cuts stimulate the economy, then next year or the year after the Republicans will have solid evidence to pass additional tax cuts for the very rich. On the other hand, if the Republicans stifle middle class tax cuts because the rich are excluded, there will be strong evidence to suggest the GOP only supports the wealthy. Not a good message, I'm sure. If the R's need cover from their base, wouldn't targeted tax cuts or credits - say for creating new jobs - make sense?