In “Communion: Finding My Way Back to Faith,” Vance chronicles his spiritual journey from childhood to young adulthood, his abandonment of religion and his eventual conversion to Catholicism. Vice President JD Vance’s new memoir serves as a preamble to a potential 2028 presidential bid, with the Republican reflecting on his faith and political career — and how he sees the former informing the latter. “ Communion: Finding My Way Back to Faith ” hits shelves Tuesday, almost exactly 10 years after