WASHINGTON (Reuters) - The impeachment inquiry into U.S. President Donald Trump will not be allowed to become a venue for "sham investigations" into Democratic presidential hopeful Joe Biden and his son, the head of a congressional committee leading the probe said on Tuesday.
Representative Adam Schiff, the Democratic chairman of the House of Representatives Intelligence Committee, made the vow as the White House and its Republican allies in Congress set up lines of defence ahead of televised public hearings that are to begin on Wednesday.