In Friday media availability after event in Gilbert, SC, frontrunner says he’s “cautiously optimistic” about his chances in Saturday’s primary.

Asserts tax disclosure desire primarily media driven: “I think you guys do, and the Democrats would like to, and my opponents would like to.”

Palmetto State topper Haley comes to Mitt’s defense on tax returns, says they do not matter to the people of South Carolina.

AND: Both Haley and Romney call on Gingrich to release congressional ethics report.

Watch the video above.