Can Christians Vote for Biden?

Pastor Timothy Keller tells Christians that their conscience can be clear when voting for pro abortion candidates. What sort of mandates do Christians have when it comes to taking care of the poor?  Tim Keller rejects claims that Christians must vote a certain way, says stop demonizing opponents  https://www.christianpost.com/news/tim-keller-rejects-claims-that-christians-must-vote-a-certain-way-says-stop-demonizing-opponents.html  By Michael Gryboski, The Christian Post, September 21, 2020  Abortion: How do Trump and Biden's policies compare?  https://www.bbc.com/news/election-us-2020-54003808  BBC News, September 21, 2020  Dr. Anthony Levatino MD, JD describes dismemberment (D&E) abortion procedure in new video from Live Action. It's time to end this in North Carolina!  North Carolina Right to Life, Inc. via Facebook, February 25, 2016