How bad would this look?

r/

Hi!! Hope everyone is doing well.

I’m a struggling first semester engineering grad student. Unfortunately it’s looking like I might get a C+ in one of my courses. This class is in my major. My uni’s policy is no grades below a B- in major courses, or else it needs to be retaken, so I would need to retake it when it’s offering next Spring.

How bad would this look to PhD applications? I’m mainly asking because I have the opportunity to withdraw still, within the next few days.

Thank you so much for your time, and thanks in advance!!