The Senate needs more time to prepare for Sonia Sotomayor's confirmation hearings after coming across 300 new boxes of documents relating to her past legal work, Senate Minority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSessions: 'We should be like Canada' in how we take in immigrants NSA spying program overcomes key Senate hurdle Overnight Finance: Lawmakers see shutdown odds rising | Trump calls for looser rules for bank loans | Consumer bureau moves to revise payday lending rule | Trump warns China on trade deficit MORE (R-Ky.) said today.

"[J]ust a day or so ago, we discovered that there are 300 boxes of additional material that has just been discovered from her time working with the Puerto Rican Legal Defense Fund," McConnell said on Fox News Sunday.

"The committee needs to have access to that material and time to work through it so we don't--so we know all the facts before we vote on a person who's up for a lifetime job," McConnell added.

Sotomayor's hearings are scheduled to begin July 13, and Senate Democrats hope to vote on confirmation before the August recess.