He will not be “Adjusting his status” Entering into the US using a visitor visa but with the intent to adjust status is unlawful You will be filing the I 130 after marrying him, in order to be approved as eligible to petition for an immigrant visa for your non USC spouse. Once the I 130 is approved, he will then complete the application for a Cr1 spouse visa, using the Consular process. This takes place while he is living in his home country. As he already has a visitor visa, he can continue to visit you while this is all being processed, but he cannot use a visitor visa to live here with you .. only visit. And entry each time is always at the discretion of the CBP at point of entry