Nancy Pelosi frustrates Democratic activists on impeachment – but party strategists like what she's doing

Roughly three dozen House Democrats have called for impeachment hearings on President Donald Trump, a billionaire's TV ads rip the House for "doing nothing," and legal experts find clear justification in special counsel Robert Mueller's report. Pelosi keeps resisting – variously citing GOP opposition, Trump's ability to exploit the issue, and the need for more investigation before making a decision.