Try this what might have been Reality seed
Zebulon Pike Western Explorer and War Hero. He died durring the War of 1812.
If you alter history and Pike lives, he's a good possibility to be a US president in the 1840s or 50's. From their you can go many directions. If, as many conspiracy theorists suggest, he was in league with Burr and Wilkinson, then you can place a traitor in the Oval Office. Or maybe he's just blackmailed by a European power. New research suggests that Pike was basically a nationalist dertermined to win glory for himself. That could work out many different ways. Since Burr was profoundly anti-slavery (his best trait in my eyes) perhaps he had a positive influence on Pike. Maybe Pike would have been an Anti-Slavery President. This could trigger an early American Civil War with a radically different outcome.