Many believe GOP leaders are “spineless cowards” who don’t stand up to Trump. But what if that is a false premise? — Washington is run by polls. Billionaires like Tom Steyer discover soon enough that wealth is insufficient to guarantee success in a presidential race. Education, intellect, political experience, effective messaging, good looks, charisma, even wit, matter. Nowhere is the barometer of overall performance on the campaign trail better reflected than in…