(CNN) Donald Trump believes he would "absolutely" be a force for bipartisanship, but in an interview this weekend neither Republicans nor Democrats escaped a barrage of attacks from the GOP presidential candidate.

Hillary Clinton launched her presidential bid on April 12 through a video message on social media. The former first lady, senator and secretary of state is considered the front-runner among possible Democratic candidates."Everyday Americans need a champion, and I want to be that champion -- so you can do more than just get by -- you can get ahead. And stay ahead," she said in her announcement video. "Because when families are strong, America is strong. So I'm hitting the road to earn your vote, because it's your time. And I hope you'll join me on this journey."

Ohio Gov. John Kasich joined the Republican field July 21 as he formally announced his White House bid. "I am here to ask you for your prayers, for your support ... because I have decided to run for president of the United States," Kasich told his kickoff rally at the Ohio State University.

Ohio Gov. John Kasich joined the Republican field July 21 as he formally announced his White House bid. "I am here to ask you for your prayers, for your support ... because I have decided to run for president of the United States," Kasich told his kickoff rally at the Ohio State University.

Sen. Ted Cruz of Texas has made a name for himself in the Senate, solidifying his brand as a conservative firebrand willing to take on the GOP's establishment. He announced he was seeking the Republican presidential nomination in a speech on March 23."These are all of our stories," Cruz told the audience at Liberty University in Virginia. "These are who we are as Americans. And yet for so many Americans, the promise of America seems more and more distant."

Businessman Donald Trump announced June 16 at his Trump Tower in New York City that he is seeking the Republican presidential nomination. This ends more than two decades of flirting with the idea of running for the White House."So, ladies and gentlemen, I am officially running for president of the United States, and we are going to make our country great again," Trump told the crowd at his announcement.

Trump flung criticism at politicians spanning the spectrum from presidential primary opponents Jeb Bush and Ben Carson to the Democratic front-runner Hillary Clinton and the man he hopes to succeed, President Barack Obama, in an interview with CNN's Jake Tapper that aired Sunday on "State of the Union."

And he lamented the House Select Committee on Benghazi's questioning of Clinton , a hearing he called "very partisan" that "hurts both parties" and "hurts the country."

"The level of hatred between Republicans and Democrats was unbelievable. The level of -- I've never seen anything like it," Trump said. "I'm going to unify. This country is totally divided. Barack Obama has divided this country unbelievably. And it's all, it's all hatred, what can I tell you. I've never seen anything like it...I've gotten along with Democrats and I've gotten along with Republicans. And I said, that's a good thing."

Tapper asked Trump if his presidency would result in an era of bipartisanship.

Photos: The many facial expressions of Donald Trump Photos: The many facial expressions of Donald Trump Many people on the Internet decided that GOP candidate Donald Trump is the most expressive person running for president. Here's a look at his many facial expressions: Hide Caption 1 of 14 Photos: The many facial expressions of Donald Trump Trump speaks about illegal immigration July 10 at the Beverly Wilshire Hotel in Beverly Hills, California. Hide Caption 2 of 14 Photos: The many facial expressions of Donald Trump Trump speaks to guests gathered for a campaign event at the Grand River Center in Dubuque, Iowa, on August 25. Hide Caption 3 of 14 Photos: The many facial expressions of Donald Trump Trump visits his Scottish golf course Turnberry on July 30. Hide Caption 4 of 14 Photos: The many facial expressions of Donald Trump Trump speaks during a rally August 21 at Ladd-Peebles Stadium in Mobile, Alabama. Hide Caption 5 of 14 Photos: The many facial expressions of Donald Trump Trump eats a pork chop on a stick while attending the Iowa State Fair on August 15. Hide Caption 6 of 14 Photos: The many facial expressions of Donald Trump Trump flashes a thumbs-up as he arrives for the start of the first presidential debate August 6 in Cleveland. Hide Caption 7 of 14 Photos: The many facial expressions of Donald Trump Trump participates in the Republican debate in Cleveland. Hide Caption 8 of 14 Photos: The many facial expressions of Donald Trump Trump arrives for jury duty in New York on August 17. Hide Caption 9 of 14 Photos: The many facial expressions of Donald Trump Trump walks his Turnberry golf course on July 30. Hide Caption 10 of 14 Photos: The many facial expressions of Donald Trump Trump at Turnberry on July 30. Hide Caption 11 of 14 Photos: The many facial expressions of Donald Trump Trump talks to the media in Laredo, Texas, during a trip to the Mexico border on July 23. Hide Caption 12 of 14 Photos: The many facial expressions of Donald Trump Trump greets onlookers after taping an interview with Anderson Cooper at a Trump-owned building in New York on July 22. Hide Caption 13 of 14 Photos: The many facial expressions of Donald Trump Trump exits New York Supreme Court after jury duty on August 17. Hide Caption 14 of 14

"I absolutely think so," he said, adding, "I will be a great unifier for our country."

While Clinton has taken flak for what she's described as a tongue-in-cheek statement that the enemies she's most proud of having are Republicans , Trump said he doesn't consider Clinton an enemy -- simply, "an opponent."

Still, for all the talk of bipartisanship and unity, Trump did not pull punches as he vigorously took on his opponents.

Trump hit Bush, the former governor of Florida, and Carson, a retired neurosurgeon, with the same line of attack -- one he has frequently used against Bush, but has only just begun using against Carson, whose reserved and calm tone strongly contrasts with Trump's brash appeal.

"(Bush is) a low-energy person. By the way, Ben Carson is a very low-energy person. We need high-energy people," Trump told Tapper. "I think Ben Carson is a very low-energy person. Actually, I think Ben Carson is lower energy than Jeb, if you want to know the truth. We need strong energy."

Trump also knocked both Bush and Carson for the support they receive from super PACs, groups that can take in unlimited amounts of money.

The developer dinged super PACs as a "big fat scam" and a "disaster" in the "State of the Union" interview, a line of criticism that he brought out more arduously than ever this weekend, just days after the super PAC backing his candidacy shuttered its operation after the group's ties to the campaign drew scrutiny last week.

But Trump suggested that he may turn his sights away from Bush and toward Carson.

That's because Carson is now the man to beat in Iowa, stealing first place from Trump (who was relegated to second place) in two polls released Thursday and Friday.

"The thing with Ben is he's got a very good PAC, and he's got people running his PAC, and in my opinion, he's got people all over Iowa from his PAC, and they are running -- Ben doesn't even go to Iowa that much. And he's doing well in Iowa?" Trump said. "I did talk about Jeb because I thought Jeb was going to be the front-runner. Obviously, he's no longer the front-runner. I probably won't talk about him so much anymore."

In a previously released segment of this interview, Trump also knocked Carson for his stances on immigration and questioned his capabilities as a negotiator.

Trump tied in his "low-energy" attacks with what he dubbed the "medieval times" that the world is currently living in -- saying that as ISIS beheads people, the U.S. needs a strong leader.

But as to whether he would approve a special forces operation to rescue hostages being held by ISIS -- similar to the one that resulted in the death of an American soldier this week-- Trump demurred.

"I think I might, but I'd have to look at the situation," Trump said.

Pushed further to explain what the Trump doctrine would be in such situations, Trump explained that it "is very simple."

"It's strength. It's strength. Nobody is going to mess with us. Our military is going to be made much stronger," Trump said.