Some European nations, like Germany and others, shouldn't be neglected. Trump might be neglecting the European Union, but this alliance also has much influence in the global economy and the military. Trump is currently restructuring the world. It seems he doesn't care about his close relationship with the EU. He is building an America that has no respect for international treaties. Greenland will be the litmus test of the power of the EU.
If we talk about major forces controlling global power, Europe is no longer worth mentioning. After decades of dependence and complacency under the umbrella provided by the US. They have even lost the ability to defend themselves, let alone compete for power in the world.
Look at their current situation: military dependence on the US, energy shortages, and backwardness in core technologies. They do not have any cards up their sleeve to sit at the same table with the US, China, and Russia
I wouldn't be surprised if the US abandoned or even traded Europe for the sake of containing the rise of China and Russia.