"Republicans" debating whether or not a porn star should be allowed into their party tells you all you need to know about which direction they're headed. This shouldn't even be a question, yes its paramount that a political party have some moral standards and sticks to them. When a political party starts bending and breaking their standards or just outright flushes them down the toilet in a bid for power its a sign that the party is entirely corrupt. Look at the democrats, no integrity, no moral standards(at this point not even the façade of moral standards just an open abuse of their voters hedonistic tendencies); the whole party is dripping with corruption on every level.
A party that has no code of conduct, ethical theory, or moral framework to base itself on will inevitably fuck over its voters. If a party believes in nothing they'll stop at nothing to secure power.