WASHINGTON, July 27 (Reuters) - President Donald Trump hit out at a prominent African-American critic on Saturday, calling him a "brutal bully" who should concentrate on cleaning up his "disgusting, rat and rodent infested" Baltimore district rather than criticizing the work of U.S. immigration officers on the Mexican border.
Trump's target in a series of early morning tweets was U.S. Representative Elijah Cummings, the Democratic chairman of the House of Representatives Oversight Committee, who has called Trump a racist and sharply criticized his immigration policies.
Democratic House Speaker Nancy Pelosi responded to Trump by calling Cummings a champion for civil rights and economic justice and added in a tweet: "We all reject racist attacks against him and support his steadfast leadership."
On Thursday, the committee voted 23-16 along party lines to allow Cummings to issue subpoenas to White House officials, including Trump's daughter Ivanka Trump and son-in-law Jared Kushner, deepening a probe into potential violations of government record-keeping laws.
In his tweet, Trump, a Republican, took aim at Cummings' criticism of his administration's Mexican border policies.
"Rep, Elijah Cummings has been a brutal bully, shouting and screaming at the great men & women of Border Patrol about conditions at the Southern Border, when actually his Baltimore district is FAR WORSE and more dangerous. His district is considered the Worst in the USA......," Trump tweeted.
"(T)he Border is clean, efficient & well run, just very crowded. Cumming District is a disgusting, rat and rodent infested mess. If he spent more time in Baltimore, maybe he could help clean up this very dangerous & filthy place," he said.
In a third tweet, Trump questioned why so much money was spent on Cummings' district, which covers the downtown area of the city of Baltimore, about 40 miles (64 km) northeast of Washington, "when it is considered the worst run and most dangerous anywhere in the United States."
"No human being would want to live there. Where is all this money going? How much is stolen? Investigate this corrupt mess immediately," Trump wrote.
Rep. Elijah Cummings
Rep. Elijah Cummings
US Congressman Elijah Cummings, D-Maryland, speaks at the White House in Washington, DC, March 8, 2017, after a meeting with US President Donald Trump. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
US Congressman Elijah Cummings (R), D-Maryland, and US Congressman Peter Welch, D-Vermont, speak at the White House in Washington, DC, March 8, 2017, after a meeting with US President Donald Trump. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
WASHINGTON, DC - JANUARY 09: (L-R) Senate Foreign Relations ranking member Ben Cardin (D-MD), House Oversight and Government Reform ranking member Elijah Cummings (D-MD), Rep. Eric Swalwell (D-CA), and Sen. Amy Klobuchar (D-MN) hold a news conference to call for an independent, bipartisan commission to investigate foreign interference in the 2016 presidential election at the U.S. Capitol January 9, 2017 in Washington, DC. Accusations of Russian computer hacks of Democratic National Committee servers and emails have lead to calls for an investigation. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - SEPTEMBER 23: Rep. Elijah Cummings (D-MD) (L) visits with Rev. Jesse Jackson during a reception in honor of the opening of the Smithsonian National Museum of African American History and Culture at the White House September 23, 2016 in Washington, DC. Presidents Barack Obama and George W. Bush will be among the guests to help open the museum to the public Saturday. (Photo by Chip Somodevilla/Getty Images)
UNITED STATES - JULY 25: Rep. Elijah Cummings, D-Md., speaks at the Democratic National Convention in Philadelphia on Monday, July 25, 2016. (Photo By Bill Clark/CQ Roll Call)
Democratic presidential candidate Sen. Bernie Sanders (I-VT) and Rep. Elijah Cummings (D-MD) hold a news conference to discuss ?legislation to lower drug prices and increase access to medications" on Capitol Hill in Washington September 10, 2015. REUTERS/Joshua Roberts
Ranking member U.S. Rep. Elijah Cummings (D-MD) (L) and chair Rep. Darrell Issa (R-CA) chat during a hearing at the U.S. House Oversight and Government Reform hearing on "Examining Obama Transparency Failures" in Washington December 9, 2014. Obamacare consultant Jonathan Gruber apologized on Tuesday for his recent remarks about "the stupidity of the American voter," telling the congressional committee he did not think President Barack Obama's signature healthcare law was passed in a deceptive manner. REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS HEALTH)
Congressman Elijah E. Cummings (D-MD) speaks during a news conference about his former staff, who lost six children of her children in an overnight fire in Baltimore, Maryland, U.S., January 12, 2017. REUTERS/Bryan Woolston
Baltimore mayor Stephanie Rawlings-Blake speaks as U.S. Rep. Elijah Cummings (D-MD) looks on during a news conference on the demonstrations for Freddie Gray, who died following an arrest by the Baltimore police department, in Baltimore, Maryland April 26, 2015. REUTERS/Shannon Stapleton
U.S. Representative Elijah Cummings (D-MD) asks questions during "The Security Failures of Benghazi" hearing on Capitol Hill, Washington D.C. October 10, 2012. Diplomatic security in Libya was drawn down ahead of last month's fatal attack on the U.S. mission in Benghazi and U.S. officials did not have enough protection, the former head of a U.S. security team in Libya told lawmakers on Wednesday. REUTERS/Jose Luis Magana (UNITED STATES - Tags: POLITICS CIVIL UNREST)
WASHINGTON, DC - SEPTEMBER 14: Congressman Elijah Cummings and his wife, Maya Rockeymoore, on the red carpet at the Congressional Black Caucus 20th Annual Celebration of Leadership in the Fine Arts at Sidney Harman Hall at the Shakespeare Theatre on September 14, 2016 in Washington, DC. (Photo by Shannon Finney/WireImage)
PHILADELPHIA, PA - JULY 25: Rep. Elijah Cummings (D-MD) gestures while delivering a speech on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25. (Photo by Jessica Kourkounis/Getty Images)
WASHINGTON, DC - JULY 07: Committee chairman Rep. Jason Chaffetz (R-UT) (R) talks to ranking member Rep. Elijah Cummings (D-MD) (L) prior to a hearing before House Oversight and Government Reform Committee July 7, 2016 on Capitol Hill in Washington, DC. The committee held a hearing 'Oversight of the State Department,' focusing on the FBI's recommendation not to prosecute Democratic presidential candidate Hillary Clinton for maintaining a private email server during her time as Secretary of State. (Photo by Alex Wong/Getty Images)
Democratic presidential candidate Hillary Clinton waves after receiving the endorsement of Congressman Elijah Cummings (D-MD) during a grassroots event in Baltimore, Maryland on April 10, 2016. / AFP / YURI GRIPAS (Photo credit should read YURI GRIPAS/AFP/Getty Images)
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Last week, Cummings slammed Trump's acting Homeland Security Secretary Kevin McAleenan over conditions of U.S.-Mexico border facilities that house migrants.
"You feel like you're doing a great job, right?" Cummings asked during a congressional hearing. "What does that mean? What does that mean? When a child is sitting in their own feces, can’t take a shower? ... None of us would have our children in that position."
Trump's attack follows his broadside two weeks ago against four congresswomen of color, which the Democratic-controlled U.S. House of Representatives condemned as racist.
Cummings responded to Trump on Twitter.
"Mr. President, I go home to my district daily. Each morning, I wake up, and I go and fight for my neighbors. It is my constitutional duty to conduct oversight of the Executive Branch. But, it is my moral duty to fight for my constituents," he said.
Cummings also highlighted a letter he co-signed to the president this week expressing "profound disappointment" at his failure to work to lower drug prices.
Baltimore Mayor Bernard Young called Trump's rhetoric "hurtful and dangerous."
"It’s completely unacceptable for the political leader of our country to denigrate a vibrant American City like Baltimore, and to viciously attack U.S. Representative Elijah Cummings a patriot and a hero," he tweeted.
Cummings represents Maryland's 7th congressional district, which according to 2010 census data was 54.6 percent black, had a median household income of $51,018, and a college graduation rate of 35.7 percent.
According to the same census, Maryland was the richest state in the United States, with a median household income of $69,272. Real median household income for the United States as a whole was $49,445 in 2010. (Reporting by David Brunnstrom Editing by Mary Milliken and Paul Simao)