Private entries, released by a Republican senator, have reignited a furious debate over whether Covid-19 leaked from a lab.

At the final debate before next week’s Democratic primary for Senate, Dr. Abdul El-Sayed and Representative Haley Stevens showcased their wildly different ideological stances and political styles.

The president also assured supporters that negotiations over ending the war in Iran, a conflict that has sent fuel and energy prices soaring, are continuing in a “friendly” fashion.

Here is a rundown of the major events of the war, as both sides consider their next moves.