travel on b2 visa

Hi there, I have a question. My cousin is an applicant with pending I589(no interview yet). Can his wife and children travel to the US with B visa? (they already have B visa and are outside of the America now). Eager for your reply. Thank you very much.

Hi, My parents are currently in India and I have applied for their I-130 (petition for Alien Relative). Is it advisable for them to travel to USA on B2 (tourist ) visa for 3-4 months? Both of my parents are retired and my only sibling is also settled in US. Can they be denied at the port of...