Mitch McConnell told reporters that Nancy Pelosi and Chuck Schumer's decision not to attend today's bipartisan meeting with President Trump "shows a lack of seriousness."

Key quote: "I never refused to go to a meeting that President Obama called ... it never occurred to me to just not show up," he said.

More from McConnell:

• On getting enough votes to pass tax reform: "It's a challenging exercise. Imagine sitting there with a Rubik's Cube trying to get to 50."
• On Trump's tax meeting with GOP senators: "He did a Q&A for about an hour."