Abigail Disney, the grandniece of Walt Disney, and Julian Robertson, founder of Tiger Management hedge funds, are expected to join Rubin in urging Congress to move on the estate tax.
Currently, the tax is repealed, but will return in 2011 to levels not seen since 2001.
Sen. Jon Kyl (R-Ariz.) could introduce legislation that would reinstate the tax before 2011. He has recently said he will seek to amend the small-business jobs bill with an estate tax fix, assuming amendments are allowed on the bill.
The Senate is expected to take up the jobs bill when it returns from the July 4 recess.