SALT LAKE CITY – Trading barbs through plexiglass shields, Republican Mike Pence and Democrat Kamala Harris turned the only vice presidential debate of 2020 into a dissection of the Trump administration’s handling of the coronavirus pandemic, with Harris labeling it “the greatest failure of any presidential administration.”Pence, who leads the president’s coronavirus task force, acknowledged that “our nation’s gone through a very challenging time this year,” yet vigorously defended the administration’s overall response to a pandemic that has killed 210,000 Americans.The meeting, which was far more civil than last week’s chaotic faceoff between President Donald Trump and Democrat Joe Biden, unfolded against an outbreak of coronavirus now.