Three retired Republican senators are creating a resistance movement against former President Donald Trump and the MAGA populists they argue are usurping the party of former President Abraham Lincoln. Retired Sens. Alan Simpson (R-WY), John Danforth (R-MO) and William Cohen (R-ME) announced Tuesday in a Washington Post editorial their intention to fight radical conservatism with a new political organization to honor what they called Our Republican Legacy. “Recently it has become popular to assert that this traditional brand of Republicanism is dead, replaced by a new populist, radical version,…