Yes you can.
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Of course, she is eligible for an L-2 visa, as long as she did not make any misrepresentations during the B-2 application process.
Gregory Romanovsky, Esq.
Yes, my office in Buffalo and New York City does this routinely for a reasonable fee. I am rated on Avvo 10.0 superb, their highest rating and many of the lawyers in your area on Avvo would be able to help you.