From a story on axios.com by Josh Kraushaar and Hans Nichols headlined “3 presidents target Pennsylvania for 2022 closing arguments”:

President Biden and former President Trump held dueling rallies on opposite ends of Pennsylvania on Saturday, in the final stretch of the midterm campaign.

Why it matters: Pennsylvania’s Senate race is likely the bellwether race that will determine which party wins the majority. The late-campaign rallies are designed to juice up base turnout on both sides, as both Biden and Trump hold low favorability ratings in the Keystone State.