Este verbo não significa vetar.
Além de poder significar veterinarian e veteran, também significa avaliar, examinar minuciosamente.
O meaning em inglês:
1 to check someone's character or reputation to find out if they are appropriate for a particular job:
They have to vet individuals who work with children.
2 to examine something in order to decide if it is allowed:
Party officials vetted every story that went into the paper.
The appropriate response is that he has already done so. The document released in 2008 is a valid Hawaii birth certificate, vetted by multiple sources including state officials, and constitutes legally sufficient proof that Barack Hussein Obama was born on U.S. soil on August 4, 1961.