[Pollster1]

The base is overwhelmingly white, but it’s foolish to dismiss the Hispanic and Asian conservatives and the (rare) black conservatives. If we focus on white conservatives, we’re dismissing a small but potentially significant group of loyal conservatives who can make a difference. They’ll never vote liberal, but we don’t want them to stay home. Our focus should be race-blind: appeal to conservatives and articulate why everyone benefits from smaller government.

[Yosemitest]

Nobody's dismissing them.
But like Ann said in her book,

HISTORICALLY, WHEN REPUBLICANS IGNORE WHITE VOTERS, THEY LOSE.
WHEN they ignore minorities and drive up the white vote, they win.
OPPOSING IMMIGRATION IS OFF-THE-CHARTS POPULAR.

YOU'VE GOT ONE MOVE, GOP.
RUN THE TABLE ON WHITE VOTERS, AS REAGAN DID !