President Obama on Friday refused to speculate on whether Vice President Joe Biden would jump into the race for the White House, even as reports swirled that Biden might be ready to announce this weekend.

"I am not going to comment on what Joe is doing or not doing," Obama said during a joint appearance with South Korean President Park Geun-hye. "I think you can direct those questions to my very able vice president."

Obama stressed that he was trying not to make a habit of commenting on every development, even as the press has been waiting and watching for a signal from Biden for weeks.

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"During the course of what will be a long campaign, I probably won't be commenting on every single utterance or decision that the various candidates make, because I think that it is natural and proper for candidates to run on their own vision and their own platform," he said. "I think that the vice president, like every other candidate, makes their own decisions about these issues and they will have to figure out whether it makes sense for them."

Obama also dodged a question about Hillary Clinton, his former secretary of state, pulling support for the Trans-Pacific Partnership.

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