If I am denied a visa at the U.S. Consulate in Mexico or Canada, can I use the Visa Waiver Program to re-enter the U.S.?
We definitely do NOT recommend this option. It is important for those eligible to use the Visa Waiver Program (VWP) to be sensible in attempting re-entry to the U.S. in VWP status after being denied the visa in Canada or Mexico. Certainly, VWP entrants (post visa denial) may not change status in the U.S. or work under their previous work authorized nonimmigrant status. Re-entry (or attempted re-entry) in VWP status could have a serious and adverse impact on your U.S. immigration status.