via @learyreports

GREENVILLE, S.C. — Jeb Bush tried to slow down Marco Rubio this week in South Carolina by attacking Rubio's claim that Bush has "zero" foreign policy experience.

"Wow, coming from a guy whose office has a hard time actually saying what his accomplishments are," Bush said, adding that the senator's approach is "going to hearings to listen to smart people talk about things rather than actually leading."

Bush used a variation of that line several times this week, which revives questions about Rubio's attendance at Senate Foreign Relations Committee meetings and his overall absenteeism in Washington.

A new, sweeping review of all committees Rubio has sat on since taking office in 2011 paints a bleak picture of participation in the day-to-day responsibilities of the job.

Rubio is on the Foreign Relations, Intelligence, Commerce and Small Business and Entrepreneurship committees. The Florida Republican has missed 68 percent of hearings, or 407 of 598 for which records were available.

His skipped 80 percent of Commerce hearings and 85 percent of those held by Small Business, records show.

He has missed 60 percent of Foreign Relations hearings since joining the Senate despite making his committee experience a centerpiece of his qualifications for president.