This chart shows that people in lower income brackets experienced much higher income growth under Democratic presidents than under Republican presidents. People in all income brackets experienced higher income growth under Democrats than under Republicans.
Conversely, under Republicans, people in high income brackets experienced much higher growth of income than people in low income brackets. However, under Republican presidents, people in all income brackets experienced lower growth than under Democratic presidents.
The conclusion is that under Republican presidents, corporate and especially financial corporate income increased while personal income at all levels decreased relative to Democratic presidents.