"It's important to me to join the Bush family in celebrating President George H.W. Bush's exemplary life," Obama's tweet read. "This will unfortunately preclude my visits to Paris and Berlin. I've been deeply touched by the enthusiasm for my memoir, and I'm working to reschedule my trip for next year.
“I hope readers and ticket holders will understand my decision regarding my desire to attend President Bush’s funeral, and join me in paying tribute to him and his tremendous contributions to our world.”