It's scheduled for this morning at 11:00am ET. The topic is North Korea's so called nuclear test.
More information from Reuters:
Bush's opening statement will be about North Korea's reported nuclear test this week and an update on the situation in Iraq, White House spokeswoman Dana Perino said.
The news conference will offer the first opportunity for reporters to ask Bush about North Korea and Republican prospects in November 7 congressional elections after a scandal involving a gay Republican congressman's sexual messages to teenaged aides.
Bush is seeking a tough response from the U.N. Security Council in response to North Korea's claim this week to have detonated a nuclear weapon.