Reports: McConnell May Not Have Enough Votes To Block New Witnesses

Senators currently lack the votes needed to block new witnesses in the impeachment trial. McConnell held a closed meeting with Republican senators after Trump's legal team concluded their arguments. Some senators remain undecided about supporting additional witnesses. Romney is particularly interested in hearing from John Bolton. Democrats have consistently pushed for witnesses, but McConnell aims to keep the trial brief by opposing new witnesses.

What factors might influence the impact of John Bolton's testimony according to the text?

What has been the Democrats' position on calling witnesses during the impeachment trial?