Why does President Trump want to eliminate capital gains taxes on home sales?

Currently a person selling a home that is not their main place of residence can pay up to 20% of the basis of the property. President Trump wants to eliminate this tax. Why does he want to do this?

He wants to stimulate the sale of houses.
He wants to help the elderly in their golden years
He can dump all his property in New York for top dollar in case Mamdami becomes the mayor.
something else.
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Why does President Trump want to eliminate capital gains taxes on home sales?
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