U.S. Senator Johnson quarantined after COVID-19 contact

Republican Senator Ron Johnson, who was due to join President Donald Trump in Wisconsin on Thursday, has instead entered quarantine after being exposed to someone who tested positive for the coronavirus, his office said in a statement.Johnson, 65, who chairs the Senate Homeland Security Committee, has tested negative for COVID-19 and is experiencing no symptoms but will remain in quarantine until Sept. 29, the statement said.On Wednesday, Johnson's committee voted to move forward with subpoenas