The mathematical model wasn't wrong, but it couldn't know with absolute certainty the pathway of Irene.

CNN: Can you trust the weatherman?

"What we don't want is to create some vague prospect in the future that somehow comprehensive immigration reform that includes a pathway to citizenship will happen, you know, manana, " Mr Obama said, using the Spanish word for "tomorrow".

BBC: Immigration reform: Obama sees deal within six months

On immigration, Boehner told the AP he was "encouraged" by bipartisan efforts to reform the nation's fractured laws, but wouldn't say whether he would support a bill that includes a pathway to citizenship for 11 million illegal immigrants.

NPR: Boehner: Up To Democrats To Prevent Budget Cuts