Trump formally objecting to probe, won’t say he’ll cooperate

President Donald Trump talks to reporters on the South Lawn of the White House, Friday, Oct. 4, 2019, in Washington. (AP Photo/Evan Vucci)

WASHINGTON — The impeachment investigation into President Donald Trump widened on Friday into a constitutional battle between the executive branch and Congress, as Democrats prepared to subpoena White House officials and the president signaled his administration would not cooperate.