(CNN) - The unmarried 17-year-old daughter of conservative Republican congressman and Louisiana Senate candidate Bill Cassidy is pregnant, according to a published report on Thursday.
"Earlier this year, Laura and I learned we will become grandparents this summer," Cassidy, a physician, said in a statement to NOLA.com/The Times-Picayune.
"Our children have been the greatest blessing of our lives and we welcome our grandchild as a joyous addition to our family," he continued. "Our daughter now faces a more challenging future than her peers. She has our unconditional love and support."
The announcement comes as Cassidy is considered the leading GOP contender challenging Democratic incumbent Sen. Mary Landrieu.
It's a closely watched race, as Republicans consider Landrieu one of the most vulnerable Democrats running for re-election in a midterm race where control of the Senate hangs in the balance.
Cassidy's daughter is a rising senior at a high school in Baton Rouge. The campaign did not provide any additional information to the Times-Picayune, and did not immediately return calls from CNN.
The statement was similar to the one released by former Alaska Gov. Sarah Palin in 2008 about her then-17-year-old daughter, Bristol.
The announcement came shortly after Palin was picked to be Sen. John McCain's running mate on the GOP presidential ticket, and just before she was set to deliver her big speech at the Republican National Convention.
CNN's Ashley Killough contributed to this report.