New Delhi, March 6 -- The Trump Gold Card, at $1 million, is proving to be a tough sell to rich foreigners, although the government estimates it already has 70,000 applicants since it launched the fast-track immigration program just six months ago.

Hard numbers aren't publicly available yet to back up the estimate from the Commerce Department, which issues the Gold Card, and the department didn't respond to Barron's request for specifics.

But lawyers told Barron's that most of their wealthy foreign clients who want to immigrate aren't applying for the Gold Card-they're pursuing other options.

The card is pricey, but the promise is big: permanent U.S. residency in record time for $1 million and a $15,000 processing fee. Record time, tho...