The Pentagon's investigation into foreign payments to former National Security Advisor Michael Flynn dominated a large portion of Thursday's briefing. Spicer said the probe was "appropriate" and that Trump made the right call to fire Flynn.

• On whether Flynn was properly vetted: "Why would you re-run a background check on someone... that had and did maintain a high-level security clearance [under the Obama administration]?"
• Trump's tax plan: Spicer originally said the plan would remove tax preferences for 401Ks, but the WH later clarified that 401K retirement savings plans would not be impacted by Trump's tax proposal.
• On shutdown questions: "The Democrats at the last minute have come in and thrown a lot of monkey wrenches into the ability to get this done despite the president doing everything he can to show good faith."
• Trump's NAFTA changes: The focus is on agriculture services, and some areas outside of NAFTA — like dairy.