Trump's Cabinet picks think a lot alike. Here's why that's a problem.

Ideologically plural governments are more likely to behave tolerantly. Ideas act as weapons, and no one position can "win out" and undo institutional integrity. In other words, what's key to a government that behaves tolerantly isn't sharing a partisan ideology, be it conservative or liberal; rather, it's having internal ideological checks and balances, including administration officials in positions of power who vigorously disagree amongst themselves. [...]If presidents or prime ministers plan to govern in an authoritarian manner, they will emphasize loyalty when picking advisers and by relying more on military and security personnel. If they plan to govern democratically, they will emphasize selecting advisers with legislative and political experience who can advance the policy agenda effectively. [The Washington Post]