Donald Trump defeated his God-campaigning opponents by using good psychology.
Not one of his opponents really had a practical political platform to offer the public. Every time they spoke, it was to demoralize Trump, and he took advantage of their weaknesses.
When you try to sling mud with a pig in his environment, you defeat your purpose. The only way the Democrats can win the presidency is to not lower themselves to Trump’s standards and to let him sling his mud.
When his opponent doesn’t pay any attention to his tactics and lets him rant and rave on, he will defeat himself.