Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE will give a foreign policy address in Washington, D.C., this week, as the GOP front-runner seeks to shift toward a more traditional campaign that appeals to mainstream Republicans.

The Trump campaign announced last week that the billionaire businessman has accepted an invitation from the Center for National Interest to speak on foreign policy at the National Press Club in Washington on Wednesday.

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“I am honored to be invited to speak at an organization founded by former President Richard Nixon, and look forward to sharing my views on the many serious foreign policy issues facing our country and our allies around the world,” Trump said in a statement.

The day before the event, Trump's campaign sent out a release that changed the location to the Mayflower Hotel "due to overwhelming interest."

The GOP front-runner said he’ll address trade, immigration, security policies and his plan for how to develop “clear, consistent long-term foreign policy for making America safe and prosperous."

It will be the first in a series of major policy addresses for Trump, who has in recent weeks made a concerted effort to run a more conventional campaign.

Trump has revamped his campaign staff with seasoned operatives and plans to open an office in Washington, D.C., that focuses on outreach to Capitol Hill.

As part of that effort, he has promised a series of policy speeches that could help him push back on criticism that there’s no substance behind his anti-establishment rhetoric.

-- Updated at 3:45 p.m. on April 26