just like the pot annie duke. >> it is like moving all your chips in. >> all in. >> playing high stakes poker. >> the debt ceiling has led to the loss of america's credit rating. >> this is the 11th time. >> those threaten not to raise it time and again, could they be bluffing? >> i will not negotiate over the full faith and credit of the united states. >> how does one side know when to back down? >> that comes from reading your opponents. >> problem solved? >> this is not some damn game. >> politics is tough. >> christine romans, cnn, new york. >>> tweeting the president of the united states. exciting for kids, right? >> who do you think has more followers? katy perry or president obama? >> katy perry. >> katy perry. >> the kids have spoken. are some celebrities misleading their twitter followers or do they just hold the key to making companies profitable? [ male announcer ] when your favorite food starts a fight, fight back fast with tums. heartburn relief that neutralizes acid on contact and goes to work in seconds. ♪ tum, tum tum tum tums! ♪ [ male announcer ] more room in economy p