Not half the population. Using approximates:

US population: 345 million

Can vote: 245 million

Did actually vote: 156 million (63%)

Voted drump: Just over half (78 million or 50.5%) of those that voted

US population who voted for tangerine: Around 22%, or 1 in 4

US population who could vote and did vote for tangerine: 31%, or 1 in 3