Extradition proceedings had been launched earlier this month.
Speaking to BBC Radio 4's Today programme, Mr Seiger said the latest move had been "factored it into our planning and strategy".
"The reality is that this administration, which we say is behaving lawlessly and taking a wrecking ball to one of the greatest alliances in the world, they won't be around forever whereas that extradition request will be," he added.
"We will simply plot and plan for a reasonable administration to come in one day and to reverse this decision."
"A denial of justice"
The Home Office said the decision appeared "to be a denial of justice".
In December 1943, George Orwell wrote an 'As I Please' essay in which he observed: "...it is difficult to go anywhere in London without having the feeling that Britain is now Occupied Territory.'
Orwell continued: "Before the war there was no popular anti-American feeling in this country. It all dates back from the arrival of the American troops, and it is made vastly worse by the tacit agreement never to discuss it in print... As a result things have happened which are capable of causing the worst kind of trouble sooner or later."
And he adds: "An example is the agreement by which American troops are not liable to British courts for offences against British subjects - practically 'extra-territorial rights'.'
In these circumstances, the current decision to block the Anne Sacoolas extradition request by the US would merely seem to be business as usual.
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