Are the Democrat candidates capable of governing the USA?

Today, the news will run all the short snippets of the various democrat candidates regarding the current problems with Iran. Mainly Trump's response to the Iranian threat of retaliation for Trump killing the Iranian head terrorist, Soleimani. When you hear those responses, ask yourself the question if that candidate could actually run the government for the best interest of the people. Or would they place the country in the position as the passive inferior to external adversarial powers with frequently stated ambitions to kill you. In particular, imagine the squeaky voiced academic Elizabeth Warren handling a blood and guts decision. Or Bernie having to step outside of his take-the-money-and-redistribute-it ephemeral solution for all things and handle a long term difficult problem that can't be solved by taking your money. The democrat party put 20 candidates on the stage. They all seem to be either crazy women or weak men. None capable of governing.