When the democrat party openly espouses demonic, blasphemous, sinful, anti-Christian doctrine and practices, it’s real hard to justify being a Christian and yet supporting the democrats in any way.
If you do, I would certainly suggest prayerfully searching your heart.
I’m not so sure those Christians who vote for the rat party have even accepted Jesus Christ into their hearts, but are rather cultural Christians, ie CINOs (Christian in name only).