A special election to replace Sen. Kay Bailey Hutchison could cost up to $30 million.
Responding to a request for a cost breakdown from the conservative group Texans for Fiscal Responsibility, Texas Secretary of State Esperanza "Hope" Andrade said in a letter released Thursday that a single special election would cost between $18 million and $20 million.
If there's a runoff, it would cost up to another $10 million, Andrade said.
Hutchison has said she expects to resign before the end of the year to focus on her race for Texas governor. Her opponent, Gov. Rick Perry, would designate a temporary replacement and call a special election to fill the senator's unexpired term.