New York City Mayor Bill de Blasio Bill de BlasioNew York to honor Ginsburg with statue in Brooklyn The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill New York again pushes back in-person classes MORE (D) is meeting with other U.S. mayors to find allies to help him oppose the Trump administration.

The New York Times reported that de Blasio will travel to Baltimore, Austin, and Washington, D.C. during a five day trip to talk about issues like tax reform and public housing.

“President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE and his Republican Congress regularly threaten the well-being of New Yorkers,” a spokeswoman for de Blasio said in a statement to The Times. “The mayor uses these events to identify key, and sometimes unlikely, allies he can work with to influence congressional members and share resistance strategies that are working.”

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De Blasio is currently attending the Progressive Caucus Center Strategy Summit in Baltimore. He is set to meet with lawmakers there, as well as San Juan, Mayor Carmen Yulin Cruz - a frequent Trump critic in Puerto Rico - and SEIU President Mary Kay Henry.

The mayor will travel to Austin for the South by Southwest Conference and a U.S. Conference of Mayors meeting. De Blasio is also set to meet with London Mayor Sadiq Khan, another critic of President Trump, according to The Times.

De Blasio will wrap up the trip in D.C. with a keynote address at a breakfast for Democratic city officials.

The New York mayor has framed himself as an opponent to Trump and his policies since Trump took office. He slammed Trump for pulling the U.S. out of the Paris climate deal and signed an executive order committing New York City to the agreement.

De Blasio has also criticized Trump for his administration's response to Hurricane Maria in Puerto Rico and over the new GOP tax law.

De Blasio is considered a contender for the Democratic presidential nomination in 2020. He traveled to Iowa late last year, but denied at the time that he was running for president.