Here are the impeachment-related stories Grassfire is tracking for Monday, January 20:

Fmr Whitewater counsel says impeachment is constitutionally flawed

Trump’s lawyers urge dismissal of 'flimsy' impeachment case

Giuliani: 'I'd Love to Be a Witness' in Senate Impeachment Trial — Would Show Corruption in Ukraine by Biden, Others

WATCH: Sen. Lindsey Graham on calls for witnesses in impeachment trial

Trump defenders push 'no crime' as Democrats seek removal

The Impeachment 'Kill Switch': McConnell Dismissal Rule Corners Democrats, Blocks Antics as Trial Commences

Sen. Ted Cruz on potential length of Senate impeachment trial (video)

No escape: Senators to be quiet, unplugged for Trump trial

Pence on Biden Family Corruption: 'The American People Have a Right to Know'

Opinion: Impeachment is a joke and shows the difference between Trump's results and Democrats' stunts