I don’t care about expanding the party, only about winning elections. Pick your battles.
But if you care about winning elections, you might want to expand the party.
Obamacare was a huge gift to Republicans, but the Democrats don't make those sorts of political mistakes very often.
One of the biggest things holding back Republicans politically is the idea that they want some national theocracy. That's unfair, but something must be done to tell the rest of the country that Republicans can handle differences of opinion on social issues.
I think for Rand Paul that means letting states decide what their mores will be and de-nationalizing social issues.