It seems you’re referring to a scenario where oil industry advocates are expressing doubt over Kamala Harris’s change in position on hydraulic fracturing, also known as fracking. They imply that her shift is a strategic move targeting popular support, hence referring to it as a ‘winning issue’.
Fracking is a process to extract oil and gas from shale rock. It is controversial due to its potential impact on the environment, causing things like water pollution and earthquakes. Its contrasts with green energy policies can make it a politically polarizing issue as well.
Let me know if you need more information on this.