Donald TrumpDonald John TrumpIvanka Trump pens op-ed on kindergartners learning tech Bharara, Yates tamp down expectations Mueller will bring criminal charges Overnight Cybersecurity: Equifax security employee left after breach | Lawmakers float bill to reform warrantless surveillance | Intel leaders keeping collusion probe open MORE said Monday that he is not intimidated by the nation’s power brokers and their attempts to halt his GOP presidential campaign.

“The establishment, the media, the special interests, the lobbyists, the donors – they’re all against me,” he said in a new online ad.

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“They are really trying to stop me,” the Republican presidential front-runner continued. "Everybody knows it, everybody sees it. We’re going to win. We’re going to win it for the people. We’re going to win it for the country. We’re going to make America great again.”

Trump then reiterated that he is free from the corrupting influence of campaign donations and wealthy patrons.

“I’m self-funding my campaign,” the outspoken billionaire said. "I don’t owe anybody anything. I only owe it to the American people to do a great job.”

The Trump campaign’s latest ad comes less than a week before Iowa’s critical early-voting caucuses, on Feb. 1. The Hawkeye State marks the first test of Trump’s legitimacy as a White House hopeful.

Trump snuck past Sen. Ted Cruz (R-Texas) in polls released Sunday, edging past his main rival for the GOP nomination. He emerged with an 11-point lead in a new Fox News poll and a 5-point lead over the freshman senator in the latest CBS News Battleground Tracker survey.

Trump has upended the Republican race by drowning out other contenders since formally launching his campaign last summer. The real estate tycoon has attracted media attention for his bombastic rhetoric and his personal celebrity.

He leads the field by nearly 16 points nationwide, according to the latest RealClearPolitics average of polls.