Ukrainian MP Oleksandr Dubinsky sought the impeachment of President Volodymyr Zelenskyy following the latter's spat with US President Donald Trump during a meeting at White House on Friday. "Zelenskyy's public humiliation...and Ukraine's loss of unconditional US support...marked the final act of...regime's collapse," Dubinsky said. Notably, Zelenskyy's presidential tenure expired in May last year.