Cruz Wins Idaho Primary

On the Democratic side, Bernie Sanders held a slight lead over Hillary Clinton in Michigan, the first major industrial state to hold a primary so far this cycle. Clinton was projected to trounce Sanders in the Mississippi primary.

On Tuesday, dubbed Super Tuesday II by some media outlets, Michigan and Mississippi held presidential primaries, while Idaho was holding a Republican primary and Hawaii a GOP caucus.

"Running for president shouldn't be about delivering insults. It should be about delivering results," Clinton said at a rally in Cleveland after her win in Mississippi.

"If we reach for love and kindness instead of bluster and bigotry, we can see the best in each other, not the worst," she said, not referring to Trump by name.

But her speech came in the midst of a press conference by Trump, and some networks stayed on the real estate mogul's remarks.

As he spoke to reporters at Trump National Golf Club in Jupiter, Fla., his press conference at times took on the tone of an infomercial, as he waved an issue of Trump magazine, and made reference to a gallery of Trump brands, including wines and steaks, which were stocked in the room. He touted his business successes, along with friendships with figures like golfer Jack Nicklaus.

"What this shows is advertising is not as important as competence," Trump told reporters.

Trump was referring to a wave of anti-Trump TV spots, including one that began running on Florida on Tuesday attacking Trump's use of offensive language. It comes from the American Future Fund, a conservative outside group that is registered as a 501(c) organization and not required to disclose its donors.

According to the Campaign Media Analysis Group, 62% of all GOP spending for the first week of March was for anti-Trump advertising, from 15% in the first week of February.

But Trump said that the results of Tuesday's primaries showed that the attack ads against him weren't working. he even suggested that the American Future Fund spot would end up helping him.

He also said that the GOP establishment should "embrace" his campaign, noting its ability to draw higher turnout.

"We will win the election easily," he said.

His campaign unveiled an ad characterizing Marco Rubio as "corrupt." A Trump win on March 15 could force Rubio from the race, and the Florida senator was running fourth in Michigan and Mississippi in Tuesday's voting.

Trump also posted a YouTube video in which he named two former students at Trump University, Bob Guillo and Kevin Scott, who have appeared in American Future Fund videos contending that they were scammed by the real estate seminar program. Trump held up course evaluations he said show that Guillo and Scott each gave their experience high marks.