A man who is believed to have volunteered for Hillary Clinton and President Barack Obama has been fired for posting a derogatory message about Navy SEAL's widow Carryn Owens.

Fox News reports that Dan Grilo responded to a tweet by a Los Angeles Times reporter about Congress applauding her, by writing, "Sorry, Owens' wife, you're not helping yourself or your husband's memory by standing there and clapping like an idiot. Trump just used you."

10 PHOTOS Carryn Owens, Navy SEAL's widow, breaks down during Trump's speech See Gallery Carryn Owens, Navy SEAL's widow, breaks down during Trump's speech U.S. President Trump Addresses Joint Session of Congress - Washington, U.S. - 28/02/17 - Carryn Owens (L), widow of Senior Chief Petty Officer William "Ryan" Owens, reacts as Ivanka Trump, daughter of U.S. President Donald Trump, and her husband Jared Kushner (R), applaud after Owens was mentioned by President Trump. REUTERS/Kevin Lamarque U.S. President Trump Addresses Joint Session of Congress - Washington, U.S. - 28/02/17 - Carryn Owens (C), widow of Senior Chief Petty Officer William "Ryan" Owens, reacts as Ivanka Trump (R), daughter of U.S. President Donald Trump applauds, after being mentioned by President Trump. REUTERS/Jonathan Ernst U.S. President Trump Addresses Joint Session of Congress - Washington, U.S. - 28/02/17 - Carryn Owens (C), widow of Senior Chief Petty Officer William "Ryan" Owens, reacts as Ivanka Trump (R), daughter of U.S. President Donald Trump applauds, after being mentioned by President Trump. REUTERS/Jonathan Ernst U.S. President Trump Addresses Joint Session of Congress - Washington, U.S. - 28/02/17 - Carryn Owens (C), widow of Senior Chief Petty Officer William "Ryan" Owens, sits with Ivanka Trump (R), daughter of U.S. President Donald Trump. REUTERS/Kevin Lamarque U.S. President Trump Addresses Joint Session of Congress - Washington, U.S. - 28/02/17 - Carryn Owens, widow of Senior Chief Petty Officer William "Ryan" Owens, applauds with Ivanka Trump (R), daughter of U.S. President Donald Trump, after being mentioned by President Trump. REUTERS/Kevin Lamarque WASHINGTON, DC - FEBRUARY 28: Widow of Fallen Navy Seal, Senior Chief William Owens, Carryn Owens (2ndL), first lady Melania Trump and White House Senior Advisor to the President for Strategic Planning Jared Kushner attend a joint session of the U.S. Congress with U.S. President Donald Trump 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 Alex Wong/Getty Images) WASHINGTON, DC - FEBRUARY 28: Widow of Fallen Navy Seal, Senior Chief William Owens, Carryn Owens and first lady Melania Trump attend a joint session of the U.S. Congress with U.S. President Donald Trump 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 Win McNamee/Getty Images) WASHINGTON, DC - FEBRUARY 28: Widow of Fallen Navy Seal, Senior Chief William Owens, Carryn Owens and first lady Melania Trump attend a joint session of the U.S. Congress with U.S. President Donald Trump 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 Alex Wong/Getty Images) WASHINGTON, DC - FEBRUARY 28: Energy Department Secretary Rick Perry (top 2ndL), Department of Housing and Urban Development Secretary Ben Carson (top 2nd R), widow of fallen Navy Seal, Senior Chief William Owens, Carryn Owens (front 2ndL), first lady Melania Trump (front 2ndR) and White House Senior Advisor to the President for Strategic Planning Jared Kushner (front R) attend a joint session of the U.S. Congress with U.S. President Donald Trump 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 Win McNamee/Getty Images) WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. President Donald Trump and the entire chamber reacts towards Carryn Owens, widow of Navy Seal Ryan Owens, as Trump 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 focused on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

The backlash has been fierce; the president's son, Donald Trump Jr., released a screenshot of the exchange with the note, "Hatred from the other side. I would think this is beyond what a human is capable of saying to someone, but it's not!"

Liberty Advisor Group, which is where Grilo reportedly worked before the incident, has since issued a statement saying, in part, "Regardless of whether the comments in the tweet were intended to cause the hurt and anger that they ultimately generated, they were unacceptable to us, and the individual who issued the tweet is no longer affiliated with Liberty."

On Tuesday night, during President Trump's address to Congress, he recognized Carryn Owens who lost her husband Navy SEAL William "Ryan" Owens in a U.S. military operation.

The Washington Post called that moment "the emotional high point of Trump's joint address..."