If the election comes down to Pennsylvania, this could be a big deal.

Biden Blows It on a Key Energy Question, and Trump Finally Strikes Oil

For most of the 2020 election cycle, Donald Trump has been desperately digging for an issue that might fracture Joe Biden’s winning coalition.

As the campaign nears its conclusion, Biden just served him up one, about wanting to “transition” away from oil.

This was the kind of mistake that is bound to happen when you serve two masters—the progressive base looking over your shoulder, and the voters you need to win on Nov. 3.