Rep. Brad Sherman (D-Calif.), a senior member of House Foreign Relations Committee, introduced articles of impeachment Wednesday against President Trump for obstruction of justice.

• In the articles, Sherman states that Trump "sought to use his authority to hinder and cause the termination of" the Russian investigations, and specifically cites Trump's alleged attempts to pressure FBI Director Comey to drop the agency's investigation into Michael Flynn, as well as the subsequent firing of Comey, as examples of obstruction of justice.
• Why it matters: After House Democratic leaders expressed concern about his calls for impeachment, Sherman assured House Minority Leader Nancy Pelosi that he wouldn't ask for a floor vote on impeachment without consulting the Democratic caucus. Now he's gone through with it.
• Why it doesn't matter: Trump can't be impeached without Republican support.