If Harris can be brought to pass some decent climate laws, which given her record is certainly possible, then the US might actually reach its way too low climate targets. Obviously state and municipality level changes also can improve it too. However that work has to be done by activists. With Trump there will be no pro climate policy on a federal level at all.
Wish I had received billions in voting power when I was born. But alas, if I had my brain would be broken and I would be incapable of empathy. Such is the way of inevitable destruction for humans.
Also the global impact would likely be much greater, due to the co-operation factor.
On the other hand, there is a time-lag to policy impact, also exogenous surprises (superimposing past presidents on that plot may be revealing).