U.S. Senate Majority Leader Mitch McConnell said on Tuesday there were "a number of troubling parts" to the deal for a sweeping Pacific free trade pact, but senators were still examining the agreement reached by 12 countries.

"We're in the process, all of us, of reading the Trans-Pacific partnership agreement. I don't have any observation to make, only that there are a number of troubling parts of it that we're all taking a look at," McConnell told reporters in the Capitol.

The Kentucky Republican did not identify which parts of the agreement were troubling him.