It's not like the housing market needs any more headwinds, so here's the government potentially giving us another: The mortgage interest deduction is back in big play in the budget deal.

It never exactly came off the table, but the bigger the budget deal, the more likely the mortgage deduction will take a bigger hit.

Right now, home loan borrowers can deduct the amount of interest they pay on their mortgages from their taxable income. This goes for principal residences and second homes. The interest deduction is capped at the first million dollars of debt on the home. For home equity loans it's capped at $100,000 in debt.