At least one Republican senator will be absent Friday when the Senate votes to approve a short-term spending bill.

Sen. Jeff Flake (R-Ariz.) (Melina Mara/Post)

Sen. Jeff Flake (R-Ariz.) will be back home attending the wedding of his 20-year-old son, Austin, his office said late Thursday.

Flake said via Twitter that he would have voted against ending debate on the measure and against final passage because he was seeking a lower rate of spending.

“Not supporting cloture on CR. Rate of spending exceeds budget cap in BCA and little chance for any real opportunity to cut spending,” Flake said in his Twitter message.

Flake and his wife, Cheryl, have five children. As a member of the House, he missed a 2009 vote on a controversial energy bill in order to support his daughter, who was competing in a beauty pageant.

News of Flake's impending absence was first reported by the Arizona Republic.