We went through the process six years ago with my wife. Had to wait 22 months on a K1 visa because of the backlog of illegals.
Many LEGAL immigrants (like my wife) can't stand those who are too lazy or impatient to go through the process, and will never vote for a candidate who supports open borders. Six months ago, when I was in California, I was shocked at how many Hispanics I spoke with are pro Trump. The general consensus was this: "We left for a reason. We don't want that scum anywhere near us." There will always be major resentment by many legal immigrants. This is the Democrats' biggest miscalculation on the issue.