Trump: Rubio a 'perfect little puppet'
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Businessman Donald TrumpDonald John TrumpDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' EU says it will 'respond in kind' if US slaps tariffs on France Ginsburg again leaves Supreme Court with an uncertain future MORE on Tuesday targeted Republican presidential rival Marco RubioMarco Antonio RubioGOP group calls on Republican senators to stand up to McConnell on election security in new ads What the gun safety debate says about Washington Trump moves forward with F-16 sale to Taiwan opposed by China MORE, suggesting the Florida senator is a "perfect little puppet" to donors.

Trump alluded to a report this week that casino mogul Sheldon Adelson, a top Republican mega-donor, was leaning toward supporting Rubio's 2016 bid. 
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"Sheldon Adelson is looking to give big dollars to Rubio because he feels he can mold him into his perfect little puppet. I agree!" Trump tweeted.

Trump labeled Rubio and former Florida Gov. Jeb Bush, another GOP candidate, as "puppets" during a bipartisan convention in New Hampshire on Monday. 
 
The billionaire real estate tycoon has maintained that he would largely self-fund his own White House bid amid an effort to cast a populist tone that he can't be bought. 
 
Trump, 69, has repeatedly gone after Rubio, 44, calling him a "kid" and casting doubt on his handling of personal finances. In turn, Rubio has labeled Trump "touchy and insecure."
 
"From time to time we’ll respond, because it’s fun to watch him blow up even more," Rubio reportedly said last week of Trump's barbs.
 
Rubio has risen steadily in the polls in recent weeks toward Trump, who has led the crowded Republican presidential field for more than two months.