Ernie died this year. His will creates a $2,000,000 QTIP trust for his widow. Ernie's executor elects to claim the marital deduction for the QTIP transfer. At the time of the surviving spouse's death, the value of the QTIP trust is $3.6 million. The amount of the QTIP trust included in the surviving spouse's gross estate is:
1. $0
2. $2,000,000
3. $1,800,000
4. $3,600,000