Battle lines drawn as US President Donald Trump's trial begins

Washington - Democrats have called on the Republican-controlled Senate to remove Trump from office.

US President Donald Trump's impeachment trial began in earnest in the Senate on Tuesday in a rare use of the constitutional mechanism for ousting a president.
Democrats have called on the Republican-controlled Senate to remove Trump from office for pressuring Ukraine to investigate former vice-president Joe Biden, a political rival, and then obstructing the inquiry into the scandal.
Trump, who was impeached last month by the Democratic-led House of Representatives on charges of abusing power and obstructing Congress, says he has done nothing wrong and describes his impeachment as a partisan hoax to derail his 2020 re-election.
With the television cameras rolling, US Supreme Court Chief Justice John Roberts convened the proceedings.