Corporate interest deductions, minimum foreign tax are among the question marks.

Corporate interest deductions, minimum foreign tax are among the question marks.

Rate for pass-through businesses would be capped at 25%.

Rate for pass-through businesses would be capped at 25%.

Republican tax negotiators reportedly targeting a corporate rate of 20%.

Republican tax negotiators reportedly targeting a corporate rate of 20%.

Conservatives in the House are split over issue of federal spending cuts.

Experts say cuts may either have to be shallow or short-lived.