U.S. President Donald Trump has floated the idea of replacing a visa program for foreign investors with a so-called “gold card” that could be bought for $5 million as a route to American citizenship.

Trump told reporters he will replace the “EB-5” immigrant investor visa program, which allows foreign investors of large sums of money that create or preserve U.S. jobs to become permanent residents, with a “gold card”, adding that details about the scheme will come out in two weeks.

The EB-5 program grants “green cards” to foreigners promising to invest in U.S. businesses.

Trump added it is possible Russian oligarchs could qualify for the gold cards, when asked by a journalist if those people would be eligible. “Yeah, possibly. Hey. I know some Russian oligarchs that are very nice people,” he said.