From the Senate version of the Brigitte Bardot Bill introduced at midnight Friday:

"(a) IN GENERAL.—Section 165 is amended by striking subsection (d) and inserting the following:
‘‘(d) WAGERING LOSSES.—
‘‘(1) IN GENERAL.—For purposes of losses from wagering transactions, the amount allowed as a deduction for any taxable year—
‘‘(A) shall be equal to 90 percent of the amount of such losses during such taxable year, and
‘‘(B) shall be allowed only to the extent of the gains from such transactions during such taxable year."

Don't ask me what this means.  If a client has $1,000 of winnings and $1,000 of losses, (1)(A) limits the deduction to $900.  But if the client has $2,000 of losses, (1)(A) limits the deduction to $1,800, but (1)(B) limits it to $1,000.

Ask me at midnight and maybe I will have figured it out.