"President Trump is innocent. President Trump did not commit any crimes," defense attorney Todd Blanche said to begin the defense's opening statements.

"The Manhattan district attorney's office should never have brought this case," Blanche said.

"You will hear me and others refer to him as President Trump. That is a title he has earned because he was our 45th President," Blanche added.

Prosecutor Matthew Colangelo told the jury, during his opening statement, "During this trial you're going to hear a lot about Michael Cohen.”

Trump's former personal attorney, Cohen is a key witness -- perhaps the only one that will testify to Donald Trump’s intent when he agreed to pay Stormy Daniels hush money.

The defense “will go to great lengths” to convince the jury Cohen is not credible, Colangelo said.

He acknowledged that Cohen had earlier lied regarding the matter. “He lied about it to protect his boss,” Colangelo said. “You will also learn that Michael Cohen has a criminal record.”

Colangelo told jurors they can believe Cohen despite his past mistakes.

“Cohen's testimony will be backed up by testimony from other witnesses you will hear from, including David Pecker, Keith Davidson. It will be backed up by an extensive paper trail. And it will be backed up by Donald Trump’s own words,” the prosecutor said.

Colangelo concluded by saying, “This case is about a criminal conspiracy and a cover-up, an illegal conspiracy to undermine the integrity of a presidential election and then the steps that Donald Trump took to conceal that election fraud. At the end of the case we are confident you will have no reasonable doubt that Donald Trump is guilty of falsifying business records.”

Prosecutor Matthew Colangelo asked jurors to ponder why Donald Trump did not negotiate the $420,000 repayment scheme allegedly proposed by Michael Cohen and then-Trump Organization CFO Allen Weisselberg.

"Donald Trump was a very frugal businessman. He believed in pinching pennies. He believed in counting every dollar. He believed in negotiating every bill," Colangelo said. "It's all over all the books he's written. He ran the Trump Organization with total control."

But when it came time to set Cohen's repayment, Trump did not question the proposal from Cohen and Weisselberg, Colangelo said.

"This might be the only time that ever happened," said the prosecutor.

According to Colangelo, Trump consented to the arrangement because he knew the scheme was to cover up the hush money payment to Daniels and other expenses.

"It was instead what they thought was a clever way to pay Cohen back without being too obvious about it," Colangelo said.

Colangelo said that the jurors will see handwritten notes from Weisselberg laying out the entire scheme.

"They agreed to cook the books," said Colangelo.

"It was election fraud, pure and simple," prosecutor Matthew Colangelo told the jury during opening statements as he outlined the hush payment to adult film actress Stormy Daniels and how it was logged by the Trump Organization

Dylan Howard, then editor of the National Enquirer, had called Trump attorney Michael Cohen to inform him about Daniels and the story that she had of a sexual liaison with Trump, which the former president has long denied.

"Cohen then discussed the situation with Trump who is adamant that he did not want the story to come out," Colangelo said. "it could have been devastating to his campaign."

At the time, Trump and the campaign were "deeply concerned" about the "Access Hollywood" video, the prosecutor said. Cohen wired the $130,000 to Daniels' lawyer to keep her quiet.

"Cohen made that payment at Donald Trump's direction and for his benefit and he did it with the special goal of influencing the election
This was not spin or communications strategy. This was a planned, coordinated long-running conspiracy to influence the 2016 election to help DT get elected through illegal expenditures to silence people who had something bad about his behavior. It was election fraud, pure and simple," Colangelo said.

Facing questions from Trump's attorney, former National Enquirer publisher David Pecker conceded that Michael Cohen was prone to exaggeration.

"Based on your experiences, Michael Cohen was prone to exaggeration?" Trump attorney Emil Bove asked.

"Yes," Pecker agreed.

"Could not trust everything he said?" Bove asked, before an objection from prosecutors interrupted that line of questioning.

Earlier, Bove continued to try to highlight inconsistencies regarding the financial component of the "catch and kill" arrangement discussed at the 2015 Trump Tower meeting.

At one point, Bove pointed to statements Pecker's attorneys previously made to federal prosecutors over information about the meeting that was included in Pecker's non-prosecution agreement.

"Your attorneys said to the DA that 'part of paragraph 3 was both wrong and inaccurate' -- do you remember that?" Bove asked.

"No," Pecker said.

As the sometimes-heated cross-examination wrapped up, Pecker remained firm in his testimony.

"I've been truthful to the best of my recollection," he said.