Sen. Marco Rubio (R-Fla.) didn't want to answer the question during Thursday night's Republican debate, but CNN's Dana Bash forced him to say how high he'd raise the retirement age for full Social Security benefits.

"Someone my age would retire at 68," the 44-year-old Rubio said, after he initially dodged Bash's request for a specific top retirement age. "We'd allow the retirement age to increase until it hits 70, so my children would retire at 70."

The current retirement age for full Social Security benefits is 67 for people born in 1960 and after. People who retire earlier get lower benefits.

Rubio desperately needs to win the Republican primary next week in his home state of Florida, which is full of seniors.