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HIGHLIGHTS-The Trump presidency on April 18 at 7:25 p.m. EDT/2325 GMT

April 18 (Reuters) - Highlights for U.S. President Donald Trump's administration on Tuesday: NORTH KOREA Vice President Mike Pence reassures Japan of U.S. commitment to reining in North Korea's nuclear and missile ambitions, after warning that U.S. strikes in Syria and Afghanistan show the strength of its resolve.

North Korea will continue to test missiles regularly and any military action against it by the United States would prompt "all-out war," a senior North Korean official tells the BBC.

JAPAN Pence puts Japan on notice that Washington wants results "in the near future" from talks it hopes will open markets to U.S. goods, adding that the dialogue could lead to negotiations on a two-way trade deal.

VISA PROGRAM Trump orders a review of the visa program for bringing high-skilled foreign workers into the United States, putting technology firms and the outsourcing companies that serve them on notice that possible changes may be ahead.

"BUY AMERICAN" Trump's "Buy American, Hire American," executive order leaves questions about how the government will enforce such an order and whether it will make any real difference in output and employment, according to steel executives and analysts.

DAIRY FARMERS During a visit to the cheese-making state of Wisconsin, Trump promises to defend American dairy farmers who have been hurt by Canada's protectionist trade practices.

CLIMATE CHANGE A White House meeting that was to help determine whether the United States should withdraw from the Paris climate accord has been postponed, an administration official says.

U.S. ECONOMY Planned fiscal stimulus from the Trump administration and Republican-controlled Congress could pose an "upside risk" to the U.S. economy, Kansas City Federal Reserve President Esther George says, adding she is not yet forecasting it will materialize.

ETHICS LAWSUIT A nonprofit watchdog expands a lawsuit accusing Trump of violating the Constitution by letting his hotels and restaurants accept payments from foreign governments.

YEMEN A political solution through United Nations-brokered negotiations is needed to resolve the conflict in Yemen, U.S. Defense Secretary Jim Mattis says as he makes his first trip in the role to Saudi Arabia.

(Compiled by Jonathan Oatis and Bill Trott; editing by Grant McCool and G Crosse)