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WASHINGTON, DC - FEBRUARY 28: U.S. President Donald Trump addresses a joint session of the U.S. Congress as Vice President Mike Pence (L) and House Speaker Rep. Paul Ryan (R) (R-WI) look on on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - FEBRUARY 28:  U.S. President Donald Trump addresses a joint session of the U.S. Congress as Vice President Mike Pence (L) and House Speaker Rep. Paul Ryan (R) (R-WI) look on on February 28, 2017 in the House chamber of  the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare.  (Photo by Chip Somodevilla/Getty Images)

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WASHINGTON, DC - FEBRUARY 28: U.S. President Donald Trump addresses a joint session of the U.S. Congress as Vice President Mike Pence (L) and House Speaker Rep. Paul Ryan (R) (R-WI) look on on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - FEBRUARY 28:  U.S. President Donald Trump addresses a joint session of the U.S. Congress as Vice President Mike Pence (L) and House Speaker Rep. Paul Ryan (R) (R-WI) look on on February 28, 2017 in the House chamber of  the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare.  (Photo by Chip Somodevilla/Getty Images)

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WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) applaud as U.S. President Donald J. Trump (C) arrives to deliver his first address to a joint session of the U.S. Congress on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)

WASHINGTON, DC - FEBRUARY 28:  (AFP OUT) U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) applaud as U.S. President Donald J. Trump (C) arrives to deliver his first address to a joint session of the U.S. Congress on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)

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WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress as U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) listen on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)

WASHINGTON, DC - FEBRUARY 28:  (AFP OUT) U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress as U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) listen on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)

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WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) applaud as U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)

WASHINGTON, DC - FEBRUARY 28:  (AFP OUT) U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) applaud as U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress is expected to focus on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)