As a lifelong Republican I feel that shutting down the government again would be a huge mistake, economically and electorally. May make the Tea-party folks feel good but it would reduce Republican chances and make Pelosi and Reid feel even better.
A) The government has shut down over budget issue multiple times before. 8 time during Carter and several times during Reagan. It is the mechanism by which budget compromise is met. B) Republicans are not shutting down the government. The proposed a budget excluding Obamacare to keep the government running. Democrats will shut down if they don't approve.