All States or Single State

$tax_query = array(
	'relation' => 'OR',
	array(
		'taxonomy'         => 'product_cat',
		'terms'            => 'all-states',
		'field'            => 'slug',
	),
	array(
		'taxonomy'         => 'product_cat',
		'terms'            => 'georgia',
		'field'            => 'slug',
	),
);