Small cracks have appeared in GOP unity on impeachment trial

Washington • The Senate seems certain to keep President Donald Trump in office thanks to the overwhelming GOP support expected in his impeachment trial. But how that trial will proceed — and when it will begin — remains to be seen.Democrats are pushing for the Senate to issue subpoenas for witnesses and documents, pointing to reports that they say have raised new questions about Trump's decision to withhold military aid from Ukraine.Once the House transmits the articles of impea