Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE sees the economy as her next battleground against Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE.

Clinton will soon deliver a major speech hammering Trump over economic issues, she told The Wall Street Journal.

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“While he may have some catchy soundbites, his statements on the economy are dangerously incoherent,” she said in a WSJ interview. "They are deeply misguided, and they reflect an individual who is temperamentally unfit to manage the American economy."

“It’s not hard to see how a Trump presidency could actually lead to a serious global economic crisis," she added.

The Journal reported that Clinton's economic speech, which will mimic her blistering attack on Trump's foreign policy from last week, will likely take place this month.

Clinton reportedly plans on attacking Trump over policy positions including large tax cuts, threats against U.S. trading partners and suggesting the re-negotiation of the national debt.

Clinton argued in her major policy speech Trump is fundamentally unsuited for the White House and safeguarding national security.

“He is not just unprepared – he is temperamentally unfit to hold an office that requires knowledge, stability and immense responsibility,” she said in San Diego.

Clinton on Monday crossed the 2,382 delegate threshold necessary for clinching the Democratic presidential nomination.

Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) repeatedly slammed Clinton’s ties with big banks and financial institutions during their heated primary fight.

Clinton on Wednesday demurred when asked if she would avoid including those with Wall Street ties on her economic team.

The presumptive Democratic presidential nominee said she is “not ruling in, not ruling out” such appointments.

“I will always look for the best people when and if that opportunity arises, and I think there’s a lot of people around the country, not just in one place in our country, with the kind of experience that would be useful."