My brother with a Belgian passport and his mother from Brazil have been travelling in California for 2-3 months (Nov-Jan). They are going back to Brazil now for family reasons (sick grandmother), but they want to go to visit friends in Vancouver, Canada soon. Then, I want to go pick them up and bring them here to Seattle for a day or two.
Are there any issues with me picking them up in Canada and then driving back over the border to Seattle to stay for a few days? Do they have to travel by plane to get into the USA? Is it likely that they will be denied entry at the US-Canada border even with valid B2 visas since they were just in the country last month?