Morrisey is well within striking distance, and if I was him, I'd be feeling just fine right now.
No recent poll has shown him within striking distance, and I could definitely see this staying D even if Republicans massively outperform expectations (it’s even less likely to flip than MT at this point, tbh). Morrisey is a Raese-tier candidate, Manchin already won against a weak opponent in a R wave year, WV elected a Democratic governor while Trump was carrying the state by 42 points, the midterm electorate in a state like WV is generally more Democratic-leaning, etc. etc.