After George W. Bush’s first term, Democrats decided to counter his militaristic rhetoric with with a candidate who was also militarized. John Kerry started his acceptance speech at the DNC with a military salute and “blah blah reporting for service.” In the end, it was his military record that was used to sink him.
You never take the battle to the territory your opponent had chosen. Instead, you need to stake your own territory. A fight that is fought on somebody else’s terms is likely to be lost.
This is why I hope that the Democrats will not repeat this mistake and won’t run an entertainment figure in 2020. Especially since they seem inclined to run a woman. A female clown will always lose to a male clown.