The White House on Tuesday instructed Don McGahn, its former counsel, to refuse to comply with a congressional subpoena for documents related to special counsel Robert Mueller's Russia inquiry, intensifying a fight between President Donald Trump's administration and Democratic lawmakers.

McGahn, who left his post as White House counsel last year, was directed not to produce White House records sought in the subpoena issued by the House of Representatives Judiciary Committee, according to the current White House counsel, Pat Cipollone.

It was the latest episode in an escalating fight between the Republican president and Democrats, who control the House and are seeking documents and testimony relating to various investigations, ahead of the 2020 presidential election in which Trump is seeking a second four-year term.