Final answer:
The nurse's priority assessment finding in this case would be increased respiratory secretions.
Step-by-step explanation:
The nurse's priority assessment finding in this case would be Increased respiratory secretions. In a patient with Amyotrophic Lateral Sclerosis (ALS) who is being admitted to the hospital with pneumonia, increased respiratory secretions can indicate worsening respiratory function and potential airway obstruction. This is particularly important in ALS patients who already have compromised respiratory function.