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 McConnellMitch McConnellDriverless car industry embraces Trump’s Transportation pick Trump flirts with Dems for Cabinet Lawmakers eye early exit from Washington 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.