“Sen. Rand Paul is waging a fierce campaign to prevent the Senate from hearing witnesses in Donald Trump’s impeachment trial, vowing to force tough votes on his fellow Republicans if they break with the president or back Democrats' demands for new evidence.”
https://www.politico.com/news/2020/01/15/rand-paul-witness-votes-impeachment-099407
“Paul says if four or more of his GOP colleagues join with Democrats to entertain new witness testimony, he will make the Senate vote on subpoenaing the president’s preferred witnesses, including Hunter Biden and the whistleblower who revealed the Ukraine scandal — polarizing picks who moderate Republicans aren’t eager to call. So he has a simple message for his party: end the trial before witnesses are called.”
