While running for California governor in 2018, Gavin Newsom declared that he would rather be bold and fail than retreat to the safety of mediocrity.

The two-term governor known for taking big political risks once again made good on that vow Thursday when he moved to offer clemency to every inmate sentenced to death in California.

Amid a hum of speculation about how the mass commutation could help or hurt his presidential prospects in 2028, the Democratic politician sent a clear, defining messag...