See the flow chart on page 12 of this IRS reference:
https://www.irs.gov/pub/irs-pdf/p54.pdf
As you will see, there is no disqualifier attached to being present on a tourist visa, but there is a requirement that your tax home be in the foreign country. "Tax home" is explained on page 11 of the same reference.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
