Firewall.

"Sen. Clinton, however, had viewed Texas and Ohio as her firewall against his momentum-building march through 11 straight primary contests before Tuesday's primaries." (Chattanooga Times Free Press) "Later on, Clinton has her three firewalls, Ohio, Texas and Pennsylvania, the kind of big states that could tip the balance one way or the other." (National Public Radio) "Unless Hillary Clinton can somehow ... maintain a big-state firewall (Ohio, Texas and Pennsylvania) after an unrelenting string of smaller defeats--the superdelegates will flock to Obama. Hope will have carried the day." (columnist Charles Krauthammer) "Should Clinton's 'firewall' of Texas and Ohio provide her no more protection than Florida offered Rudy Giuliani, then Democrats, with the nomination process effectively over, can begin efforts to unify the party and focus on winning the hearts of independent voters key to victory in general election." (columnist Donna Brazile) "For one thing, if this is an election where a candidate wins by virtue of being seen as winning--a definition of momentum--that would mean that voters in coming states would be influenced by the outcome of earlier races. And Mr. Obama might then be in a position to encroach on Mrs. Clinton's firewall of Texas and Ohio." (New York Times) "But in Texas, Latinos may not be the firewall that the Clinton campaign needs. The Obama mystique transcends cultural barriers." (Economist) "Polls show the New York senator losing ground in her firewall contests, and The New York Times reported Tuesday that the Clinton camp is throwing what one aide called the 'kitchen sink' of attacks at Obama." (Foxnews.com)