(CNBC) — Donald Trump's audacious presidential bid is starting to look more like a campaign as voting starts. But the billionaire's methods remain far from conventional.
The businessman lent $10.8 million of his own fortune to his campaign in the fourth quarter as it began funneling more money into advertising and ground operations, according to data filed with the Federal Election Commission on Sunday. But the campaign continued to burn less cash than key opponents on the Republican and Democratic sides.
Trump's lean campaign could become more crucial as a string of voting kicks off, starting with the Iowa caucuses on Monday night. The tycoon, the front-runner in most state and national Republican polls, has also shown a willingness to spend that could keep him in the race for the long haul.
Advertisement - story continues below