US PRESIDENT Donald Trump said today he would boycott an impeachment inquiry against him, rejecting it as illegitimate and a violation of the constitution.

In a letter sent to Democratic Party leaders, Mr Trump warned that the proceedings against him were “baseless” and violated “fundamental fairness and constitutionally mandated due process.”

The White House letter complained that Mr Trump was being denied the right to cross-examine witnesses, to call witnesses “and many other basic rights guaranteed to all Americans.”