"Donald Trump's presidential campaign in 2015 had no pollster, rapid-response team or fundraiser. A bare-bones staff fueled by pizza and energy drinks toiled in a makeshift office at Trump Tower. His opponents vastly outspent him - and lost.
But as president, Trump's campaign machine has dramatically escalated, powered by a historically large war chest of donations large and small that has given him a head start over the eventual Democratic nominee...."
https://www.bhmgnews.com/bh/article_959ec7a0-e9bb-11e9-8cf6-20677cef02cc.html