Why would thatbe true for the trial in the Senate and not for the impeachment in the House where the Dems controlled everything including the questionsvthevwitnesses could answer?
The issue I was addressing was the White House claim that the House (and presumably also the Senate) could not subpoena employees and former employees to testify. The judge ruled that they could testify. The link below explains in some detail. There will likely be an appeal and at some point the Supremes might be involved.