A security staffer who listened to the call between President Donald Trump and Ukraine says he was concerned by the demands for a probe into a Trump rival.
Alexander Vindman, a decorated army veteran, told Congress he reported his objections to pressuring Ukraine to investigate Democrat Joe Biden twice.
Col Vindman is the first White House official who heard the call to testify as a part of the impeachment inquiry.
The inquiry concerns alleged abuse of power by the president.
Attorney Israel Khan said he plans to write to Director of Public Prosecutions Roger Gaspard to determine whether Chief Justice Ivor Archie acted improperly and whether there are grounds for him to be impeached.
This follows claims by former chief magistrate Marcia Ayers-Caesar that her removal as a High Court judge was “unlawful and unconstitutional” because she was put under pressure to resign.
She said so in a May 19 tell-all letter to President Anthony Carmona.
Suspended President Dilma Rousseff told the Senate on Monday the future of Brazil was at stake in her impeachment trial as her conservative opponents were using trumped-up charges to oust her and roll back the social advances of the past 13 years.
The leftist leader, appearing before the Senate to defend herself in a process expected to remove her from office this week, said Brazil's economic elite and political opposition had sought to destabilize her government since her 2014 re-election.