INSIGHT-How US allies are preparing for a possible second Trump term

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Leaders, former leaders and diplomats meet Trump

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Saudi Arabia's crown prince called him, source says

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Worried about tariffs, Germany met Republican governors

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Mexican candidate to tailor envoy choice if Trump wins, sources

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Rudd pushed Canberra to Trump-proof submarine deal

(Adds comment from South Korea's foreign ministry in paragraph 56)

By Alexander Ratz, Diego Oré and Gram Slattery

BERLIN/MEXICO CITY/WASHINGTON, April 24 (Reuters) - G ermany is waging a charm offensive inside the Republican Party. Japan is lining up its own Trump whisperer. Mexican government officials are talking to Camp Trump. And Australia is busy making laws to help Trump-proof its U.S. defense ties.

Everywhere, U.S. allies are taking steps to defend or advance their interests in the event former President Donald Trump returns to power in November elections, an even chance based on recent opinion polls in swing states.

They want to avoid the cold slap that Trump's "America First" policies dealt them last time around, which included trade wars, a shakeup of security alliances, an immigration crackdown and the withdrawal from a global climate accord.

Reuters spoke to diplomats and government officials in five continents about preparations for Trump 2.0. It uncovered Mexican deliberations over a new, Trump-savvy foreign minister, an Australian envoy's role in rushing to protect a submarine deal, and a German official's talks with Republican state governors.

Some foreign leaders have contacted Trump directly despite the risk of irking his election rival, Democratic President Joe Biden. Saudi's crown prince recently phoned Trump, a source with knowledge of the conversation said; while Hungary's prime minister and Poland's president met him in person in recent weeks.

British Foreign Minister David Cameron also held talks with Trump this month at his Florida resort. He told reporters in Washington afterwards that his meeting was a private dinner where they discussed Ukraine, the Israel-Gaza war, and the future of NATO.

The White House referred Reuters to comments by spokesperson Karine Jean-Pierre in which she said meetings such as the one held by Cameron were not uncommon. She declined to answer questions about Trump's meeting with Orban or the Saudi call, which was first reported by the New York Times.

The Saudi government's media office and the Trump campaign did not respond to requests for comment about the call The campaign said he discussed security issues with each of the European leaders, including a proposal by Polish President Andrzej Duda that NATO members spend at least 3% of gross domestic product on defense. Currently, they aim to spend 2%.