Do you believe Russia would have invaded Ukraine if Donald Trump was president at the time?

yeah the motivation may have been more economic as opposed to political alignments. Ukraine has a lot of oil and natural gas. For supply chaining it is a key spot for internal trade logistics for Russia.

actually almost all wars are economic and or religious. If you wonder "why" on any war the place to start is economics of the region contested followed by religious propensity of the area and invading area.