Officials had also considered the Shangri-La Hotel, which hosts an annual worldwide security summit and was the venue for a 2015 meeting between Chinese President Xi Jinping and Taiwanese President Ma Ying-jeou.
"We feel like things are continuing to move forward", Sanders said, "and good progress has been made, and we're continuing to prepare for the president's summit".
Sanders said there has been no change in what Trump has described as a "maximum pressure" campaign on the North Korean regime.
North Korea's state media Korea Central News Agency criticized Abe and other Japanese officials for insisting on pressuring the North. KCNA, quoting the Rodong Shimmun newspaper, said Japan worries about being "marginalized from the structure around the Korean Peninsula".
1211 6/4 "And I can also tell you the schedule for - tentatively - for that first meeting will be on June 12 at 9 a.m. Singapore time and take place June 11, 9 p.m. east coast time".
The United States and North Korea agreed upon Singapore last month as the venue for the first ever meeting between leaders of the two countries.
The summit holds great importance as the denuclearisation of North Korea is expected to be discussed.
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"The President has broad discretion under existing sanctions law against North Korea".
"We're not paying for their expenses", she said. "We're going to start a process".
Trump said in March that the two leaders would meet soon, but since then already poor ties between Washington and Moscow have deteriorated further over the conflict in Syria and the poisoning of a former Russian spy in Britain.
Kim is unlikely to spend much time in Singapore.
In 1971, Idi Amin famously seized power in Uganda while President Milton Obote was in Singapore for a meeting of Commonwealth leaders.
He may play some role in the negotiations, it said quoting anonymous sources.