WASHINGTON (REUTERS) - Republican presidential candidate Donald Trump said on Tuesday (Dec 29) he plans to run advertisements in early-voting states ahead of the first nominating contests in 2016.

"I'll be spending a minimum of US$2 million (S$3 million) a week and perhaps substantially more," Mr Trump, the party's front runner, told reporters, according to video that aired on CNN.

"I'm going to be doing big ads in Iowa, New Hampshire, South Carolina, and they're going to be very substantial."