The U.S. has claimed the right to kidnap people off the street, detain them indefinitely, or kill them as it deems necessary. I'd be very surprised if any of those tactics would be used on Assange, but in that context pressuring/asking another country to deport him to the U.S. to face charges seems within the realm of possibility.
If you were Assange, would you want to gamble life in prison on your odds, whatever they are?
So if I was Assange, yes I would.
If you were one of them, would you do that?
First, there are claims of a sealed indictment. Second, Dianne Feinstein and other similarly influential people have called for charges. And third, they have reason to delay those charges: laying them now would make extradition harder, as compared to extraditing for a subpoena and then bringing charges.
The result is that he's not charged (which could make things like grounding planes harder) but I don't know anyone who seriously believes he wouldn't be charged if he showed up in the US tomorrow.
https://en.wikipedia.org/wiki/Julian_Assange#U.S._criminal_i...
[1] https://en.wikipedia.org/wiki/Whistleblower_Protection_Act
[1] https://en.wikipedia.org/wiki/United_States_Office_of_Specia...