Despite losing the presidency and both Houses of Congress, Donald Trump still seems to have a chokehold on the Republican party. So what will Republican anti-Trumpers do next: continue the fight from within the party, or get out and create a new one? Evan McMullin is one of the most prominent American Republicans determined to loosen President Trump's grip on the Party, and one of the key organisers and strategists behind the Stand Up Republic group of unhappy Republicans.