Strange comment .. He was already arrested in the UK, which has an extremely liberal extradition policy with the US. He spent a week in Wandsworth prison.
I believe the legal term for that is bollocks. The procedures are here[1]. Note that it forbids extradition if the person would face the death penalty.
Although the death penalty in the US seems to be a very remote possibility, one gathers that the prospect of 45 years in a US jail is not. At present it looks like 45 years in the UK Ecuadorian Embassy: ""We will not allow Mr. Assange safe passage out of the United Kingdom nor is there any legal basis for us to do so," UK Foreign Minister.