Victor Davis Hanson writeBoth Donald Trump and his opponents are up against the constraints of time. 

Trump wants to run out the clock; Ted Cruz and Marco Rubio want overtime. Trump does not want any more Texas-debate–style fights with Rubio and Cruz, and yet he still has four more debates on his schedule. In each one, we will see a geometric increase in attacks on Trump — all the more so if Carson or Kasich, or both, drop out, and the allotted debate time is split just three ways.

For the first time in the already too long series of debates, candidates descended to Trump’s brash style of street fighting. And they wounded him — not enough to seriously injure his candidacy, but enough for us to see how more of the same certainly might (and how more far earlier might have done so already).