特朗普总统采取行动禁止机构投资者购买独栋住宅

The assessment hinges on the interpretation of the phrase 'initiated a policy or action'. The primary evidence from Reuters, a high-authority source, directly reports a statement by Donald Trump indicating his intent to ban large institutional investors from buying single-family homes. A public declaration of intent by a major political figure is a clear 'action' and the 'initiation' of a policy proposal, as it introduces the idea into the political discourse and signals a formal objective. While other high-authority sources, such as the official White House page for Presidential Actions, do not show that a formal law or executive order has been enacted, this does not invalidate the claim. The statement does not claim the policy has been finalized or implemented, only that it has been 'initiated'. The Reuters report provides strong, direct evidence of this initiation. The remaining sources are largely irrelevant to the specific claim and neither support nor contradict it.