Can mortgage interest of primary residence be a business expense?

[Andreas W.]

I have a question in regard to refinancing rental property. The interest rate spread of a conventional mortgage between a rental property and a primary residence is about 1.5%. I remember the time when it was closer to 1%. In order to take advantage of the current low interest rates, can I cash out refinance my primary residence and still deduct the interest payments as a business expense?

[Chris Mason]

FYI the rate gap between rate/term, and cash out, is also on the higher side right now. 

To answer your question directly, I'm not a tax professional, but I believe the answer is "no."