Erin Burnett Outfront

As Coronavirus spreads in U.S., Trump tries to blame Obama for testing delays but GOP senator's office says claim is not true, New delegate numbers from Super Tuesday show Biden expanding his lead over Sanders, Biden passes 500 delegate mark, expands lead against Sanders, New delegate count: Biden 509, Sanders 449, Warren weighs her options after disappointing Super Tuesday, Pressure mounts for Coronavirus vaccine as cases surge, When push comes to shove, there's Jill Biden via Knit