Unfortunately, the Dems and the GOP and their propaganda arms parading as 'news' have convinced us that politics is a war of ideals, not a question of good governance. Bernie wins the ideological battle every time. He's a great candidate if you want to win ideological warfare.
However, I predict that Bernie would have been a poor President because good legislation cannot pass ideological purity because it is by nature a product of compromise.
I'm tired of this leadership stuff. The president is a public servant that commands our troops, appoints justices, and signs legislation.