So, Thompson just brought up a straw man -- one a pro-abortion politician would use -- to oppose such an amendment.
Oh, no, it's not a straw man. Thompson just told the truth.
If - and it's a very big IF - a law could be passed to outlaw abortion because in the eyes of the law it was murder - there would need to be vigorous enforcement activity. Hundreds of people would have to be arrested and incarcerated (if not thousands).
He who says A says B.
It is dishonest to tell people to vote for a Constitutional amendment but not to worry because no one will be punished.
To accomplish what you seek, you will have to tell the people what the result of your proposal will be.
In 1917, the Constitution was amended (amazingly) to criminalize a behavior that a huge majority of people did not view as criminal.
The result was predictable - and that predictable result occurred despite vigorous enforcement.
This battle cannot be won in the political arena until it is won in peoples homes and hearts.
W said that, FDT now says that, and any politician who tells you otherwise is a liar.
If the HLA could be implemented by decree, nothing would change.