Hmmmm, wrong. That's bullshit. That assumes his percentage of the other voting blocks won't change.
You need women, Gays, Millennials, single women, Hispanics, Blacks, and you cannot win without a sizable percentage of each. Now please tell me how you, Trump and the Republican Party, are going to pick up votes from them when you have run off Planned Parenthood, put in place harsh abortion law, tried to keep the gay marriage situation unequal, do nothing about jobs, do nothing about the cost of an education, plan to deport all illegals and separate families, and make fun of "black Lives Matter?