I think for this to happen, you need a sizable body of Americans who are calling on the British to intercede. My thought is that if the British pressed less hard and ended the war sooner you'd have more disaffected loyalists still on the ground and still somewhat feisty. Combine that with radicalism getting out of hand/gaining the upper hand and you might get a number of the Founder types and a substantial body of OTL rebels calling on the Brits to intercede and cooperating with them when they invade.
So, two different trends from OTL: (1) an easier, shorter Revolution that beats down or drives out the loyalists less than OTL combined with (2) radicalism getting out of hand a la the French Revolution.
Actually, No. 2 might be enough by itself.
So, two different trends from OTL: (1) an easier, shorter Revolution that beats down or drives out the loyalists less than OTL combined with (2) radicalism getting out of hand a la the French Revolution.
Actually, No. 2 might be enough by itself.