Republican Donald Trump has unveiled a plan to boost military spending by tens of billions of dollars on Wednesday, outlining a plan for major increases in the number of active troops, Navy ships and submarines, and fighter planes as he works to convince skeptics in both parties that he’s ready to lead the world’s most powerful military.

The New York businessman, who has struggled at times to demonstrate a command of foreign policy, also seemed to acknowledge he does not currently have a plan to address cyber security or the Islamic State group.

If elected, Trump said he would give military leaders 30 days to formulate a plan to defeat the group, commonly known as ISIS. And he would ask the joint chiefs of staff to conduct “a thorough review” of the nation’s cyber defenses to determine all vulnerabilities, according to a fact sheet distributed by his campaign.

Trump’s address comes hours before his national security acumen is tested at a “commander in chief” forum on NBC.

“I’m going to make our military so big, so powerful, so strong, that nobody — absolutely nobody — is gonna to mess with us,” Trump said in a 23-second video posted on his campaign website ahead of a speech at the Union League of Philadelphia.

The appearances mark an intense, two-day focus on national security by Trump, who has offered tough rhetoric on America’s challenges abroad but few details.

The United States currently spends more than $600 billion a year on the military, more than the next seven countries combined.

Trump’s rival, Democrat Hillary Clinton, has tried to paint the billionaire businessman as erratic, making the case that his disposition would be a major liability on the world stage.

“They know they can count on me to be the kind of commander in chief who will protect our country and our troops, and they know they cannot count on Donald Trump,” Clinton said Tuesday. “They view him as a danger and a risk.”

Trump has pushed back on that characterization.

“I think my single greatest asset, of any assets I have, is my temperament,” Trump declared in North Carolina on Tuesday.

While Clinton and Trump will be featured at the Wednesday night forum, they will appear at separate times and will not face each other on stage. The forum could serve as a warm-up to their highly anticipated first presidential debate, scheduled for Sept. 26 in New York.

It comes as Trump’s campaign announced an end to its practice of barring selected media from covering his events.

Trump will deliver another speech Wednesday evening, at the convention of New York’s Conservative Party.

Trump’s Union League address also includes his plans to eliminate deep spending cuts, known as the “sequester,” enacted when Congress failed to reach a budget compromise in 2011. Republicans and Democrats voted for the automatic, across-the board cuts that affected both military and domestic programs.

Trump has given mixed signals about whether he wants to increase military spending overall.

While Trump has often complained that U.S. forces are not large enough or well-equipped, he’s also said that he’d save money by cutting waste and ensuring that contractors aren’t getting sweetheart deals because of their connections or lobbying efforts.

His position on the sequester has been even more murky. Trump expressed support for the cuts in interviews in 2013 — even describing them as too small — but seemed to suggest at the time that military spending should be exempt, undermining the sequester premise.

A Trump adviser, speaking on the condition of anonymity to share details ahead of the speech, said Trump would ensure the additional spending is fully paid for. The adviser did not explain how, but suggested there would be no need for structural budget cuts to pay for the billions of additional military spending over 10 years.

Beyond new spending on troops and naval assets, Trump also supports additions to sea-based missile defense.

Trump’s campaign released a letter on Tuesday from 88 retired generals and admirals citing an urgent need for a “course correction” in America’s national security policy.

But questions remain, even in his party.

Questioned on MSNBC’s “Morning Joe” on Wednesday, Bob Corker, the Republican chairman of the Senate Foreign Relations Committee, repeatedly refused to say directly whether he had confidence in Trump as commander in chief.

“I do believe that Donald Trump is growing in his understanding of these issues and I think that he’s beginning to get more and more people around him that have a depth of understanding as to the complexities and I’m watching this evolve,” he said. He added that, “we’ll all make our assessments,” in the candidates’ foreign affairs abilities by early November.

On Tuesday, Trump promised to convene his military commanders soon after taking office with “a simple instruction” aimed at the Islamic State group. “They will have 30 days to submit to the Oval Office a plan for soundly and quickly defeating ISIS,” he said.

(AP)