“The 1967 lines” always refer to “The line of June 4 1967”: jewishvirtuallibrary.org
If anyone wishes to claim otherwise, could he please provide a single instance where this phrase refers to post six-day war cease fire lines.

The US position has always been that Israel should withdraw to defensible borders. The pre-1967 borders are anything but defensible.

The Green line is not Israel’s border today! E.g., even Jimmy Carter, no friend of Israel, has conceded that Gush Etzion will not ever go back to the Palestinians. The city of Ariel has close to 20,000 residents, and will not go back to the Palestinians.

Obama’s speech is a departure from previous US policy. However, make no mistake. If the US stance versus Israel toughens, it will simply encourage Israel ignore the US. Israel will not endanger its security simply to secure its friendship with the US.