Julian Assange can remain in Ecuador's embassy 'for however long it takes'

[pnwmom]

6. This is a matter for Sweden and the UK.

The US doesn't want him to be extradited to Sweden, because it would be harder for the US to extradite him from there. If Sweden gets him, he couldn't be extradited here without the permission of BOTH the UK and Sweden. And Sweden doesn't extradite in political cases.

http://www.newstatesman.com/blogs/david-allen-green/2012/08/legal-myths-about-assange-extradition

“Assange is more likely to be extradited to USA from Sweden than the United Kingdom”
This is similarly untrue. Any extradition from Sweden to the United States would actually be more difficult. This is because it would require the consent of both Sweden and the United Kingdom.

(See Francis FitzGibbon QC’s Nothing Like the Sun for further detail on this.)

One can add that there is no evidence whatsoever that the United Kingdom would not swiftly comply with any extradition request from the United States; quite the reverse. Ask Gary McKinnon, or Richard O'Dwyer, or the NatWest Three.

In reality, the best opportunity for the United States for Assange to be extradited is whilst he is in the United Kingdom.