Can my Russian girlfriend come to the US?

I'm curious, can my Russian girlfriend obtain a visa to visit the United States? I understand there are certain requirements and procedures in place, but I'm wondering if her nationality poses any additional challenges or restrictions. Are there any specific steps we should take to ensure a smooth application process? Additionally, what are the typical wait times for a visa approval, and are there any factors that could potentially expedite the process? I'd appreciate any insights or advice you can offer on navigating this process.