Possibly a slightly flippant question, but I figure if I can't get it answered here I won't anywhere.
I've just finished watching the first season of Designated Survivor on Netflix, where I suppose Kiefer Sutherland is doing penance for torturing all those bad guys by playing POTUS as a European Social Democrat(!) - but it set me to wondering.
We've had West Wing, House of Cards, Veep plus many different movies and other TV series focusing on the US presidency and every one has a virtually identical Oval Office/White House set. My question is - is there a long term WH set somewhere that all these different productions hire out, or does each of them build their own?