Is it legal for an employer to take you out of your commission based department during work hours?

I am a Commission + Base sales associate at Sears. I was recently asked to leave my commission-able department to assist in an area in which i would not make sales. I was asked and said no, and further expressed my concern of " moving me out of my commission-able department would take away any opportunity to sell and would negatively affect my income" I was then threatened with an accusation of insubordination. I expressed to management i was aware what insubordination is and i did not feel as though i was being insubordinate by expressing my concerns. I did as was asked and helped customers outside of my commission-able department. Almost immediately i was called downstairs. I was then taken into a dimly lit office of the store manager and felt threatened for expressing my concerns. I admit perhaps i could have lead with my concerns rather than saying no, but that is just semantics at this point. I was told i had an attitude, Where i felt i was speaking very professionally in expressing again my concerns of the management limiting my ability to make commissions( this is the main source of income) and i expressed i felt as though i could have open lines of communication with management. This experience of course has made me feel otherwise. I was asked to clock out for the day, hand over my name tag, and i would get a call with the next steps. ( i assume they need to talk to HR). Im curious what my rights are. I was accused of not being a team player, I would disagree as i did indeed take customers and limit myself from commission-able sales as well as when i was on boarded i helped in multiple departments. I was told other commission departments did what was asked of them and worked outside their commission-able departments. Im lucky this is not my only source of income and i rather work retail because i love working amongst people and customer service. I have heard from other team members their complaint about this same matter, But ofcourse cannot say anything to management out of fear they would be terminated. A threat i have personally experienced. If you have any advice and/or links to websites referencing my dilemma please let me know. Thank You in advance