I agree with Rubio's sound reasoning.

If the election comes down to corrupt lunatic Hillary and Donald Trump, voters will have to decide between a perceived lunatic, Trump, or a proven war monger lunatic, Hillary, {Iraq war propaganda and vote, Libya and Syria}, with  access to nuclear launch codes.  
 
    Trump won't feel a compulsion  to  start wars. He's spent a life time being in charge as the Boss.
   He won't  need to prove he is a capable leader. He'll perform his Presidential  job with flying colors .
 Plus, President Trump will  be too  busy collecting toll dollars from Mexico and making America economically strong to waste time, lives and energy, starting wars. .
 
   
   I have no doubt, Hillary's insecurity will cause her to push her weight around the Globe,  especially where we don't belong, vainly attempting to prove she's not weak, most  likely starting unnecessary wars.  

http://www.chicagotribune.com/news/opinion/chapman/ct-hillary-clinton-barack-obama-bernie-sanders-john-kerry-1115-20151113-column.html

"Pressed again about how he could reconcile his support for Trump with his remarks that Trump shouldn't get access to the nuclear codes, Rubio said that Republican voters had spoken. "That said, it doesn't change what I said in the past. I stand by those things," Rubio added. "But now he is the presumptive nominee. I don't want Hillary Clinton to win.