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More mudslinging and barbs in ads as nomination races heat up

It was a week of political mudslinging on the campaign trail among GOP contenders, while a Hillary Clinton ally filed complaints against Bernie Sanders.

The 2016 presidential campaign has seen scathing insults traded between candidates. It was a week of political mudslinging on the campaign trail among GOP contenders in advertisements, while a Hillary Clinton ally filed three complaints with the Federal Election Commission against Bernie Sanders' campaign.

Kasich Vs. Cruz: "Many just call him Lyin’ Ted"

Ohio Gov. John Kasich is coming out of the shadows and is no longer Mr. Nice Guy. Kasich, who is trailing GOP front-runner Donald Trump and Texas Sen. Ted Cruz, received help from a Super PAC. New Day for America borrowed a line from Trump, calling Cruz 'Lyin' Ted." 

"Lied about Ben Carson to steal a win in Iowa," the narrator said in reference to Cruz campaign staffers who pushed out information on the night of Iowa caucuses, saying that Carson was dropping out of the race. The ad also shows Cruz's nose wrapping around his neck three times.

RELATED: Clinton 'sick of the Sanders campaign lying'

Trusted Leadership PAC, which is supporting Cruz, knocked Kasich's "liberal record" and claimed that millionaires working with billionaire financier George Soros, a Democrat, are "bankrolling" super PACs supporting the governor.

Kasich's campaign has argued that a vote for Cruz is a vote for Clinton. Cruz's team, has maintained that Kasich would only help Trump get the GOP nomination.

Clinton and allies attack Trump

While the former secretary of state is locked in an highly contested race in New York with Sanders, Clinton has been pivoting to the general election. The Democratic front-runner and two top Super PACs supporting her, launched their first set of attacks on GOP front-runner Donald Trump. In her first television ad, showcasing the Empire state's diversity, Clinton scrutinized Trump's proposal to build a wall along the U.S.-Mexican border and a temporary ban on Muslims entering the country.

Priorities USA and Planned Parenthood Action also lashed out against Trump in an ad on Thursday, using controversial remarks he made on MSNBC about women facing "some form of punishment" for having an abortion. "We have too much to lose to let him win,” the ad said. “Vote for Hillary.”

Clinton ally files ethic complaints against Sanders

Clinton and Sanders continue to draw sharp contrasts between themselves as the nominating contest shifts to New York. But that didn't prevent David Brock, a Clinton ally, from filing complaints against the Vermont senator this week with the Federal Election Commission. He claimed that Sanders' campaign accepted more money from individual donors then allowed under federal law, is improperly using his name and allegations of illegal coordination. The senator had rejected the complaints, and the FEC's decision is pending.