Overwhelming = under 25% of the US population that voted for him in 2016? Even among registered voters only it's still under 50% - how is that overwhelming?
Big citation needed on who of non-voters support Trump. Most opinion polls that include anyone (not just registered voters) still have Trump's approval at 40ish percent the past 4 years.
If you say all polling is invalid/not representative, where are you getting your numbers from?