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WASHINGTON (AP) - An Army private charged in the biggest leak of classified material in U.S. history is set to tell a military judge today how he did it and why.

Pfc. Bradley Manning will answer questions from the judge who is considering whether to accept his offer to plead guilty to some charges.

Manning's only public explanation for giving classified material to WikiLeaks can be found in logs of an online chat with a confidant-turned-government informant. In those chats, Manning wrote that he engineered the leak because "information should be free" and he wanted "people to see the truth."

Even if a judge accepts his guilty plea, prosecutors can still pursue more serious charges against Manning. One charge is aiding the enemy, which carries a potential life sentence.

WASHINGTON (AP) - President Barack Obama's chief of staff says the White House hasn't proposed "anything to Capitol Hill yet" on immigration even as a leading Republican criticizes a reported draft proposal regarding illegal immigrants.

That draft, according to USA Today, would create a visa for the estimated 11 million illegal immigrants in the United States and allow them to become legal permanent residents within eight years.

Obama aide Denis McDonough tells ABC's "This Week" that the White House is working with a bipartisan group of senators.

GOP Sen. Marco Rubio of Florida says if such a measure was proposed, it would be "dead on arrival" in Congress.

McDonough says "let's make sure that it doesn't have to be proposed" because the White House and Congress are able to work out a deal.