China has launched military drills in response to a much-anticipated meeting between Taiwan's president Tsai Ing-wen and US House Speaker Kevin McCarthy.

They met in California on Wednesday, a week after President Tsai was feted in New York with a leadership award.

Ms Tsai hailed their "strong and unique partnership", and Mr McCarthy said that arms sales to Taiwan must continue.

Beijing, in turn, has vowed a "resolute response" and sent warships into the waters around the self-governed island.

Taiwan, it appears, is caught in the middle of a dangerous love triangle.

The timing of Ms Tsai's visit is hardly a coincidence. In the US there is deep and growing hostility to China. And this is driving ever more open displays of support for Taiwan, with Democrats and Republicans competing to out-do each other.

It's a big reason former House Speaker Nancy Pelosi was so keen on landing in Taipei last summer, despite the fact that it set off a furious reaction from China. The self-governed island, which Beijing claims as part of its territory, is arguably the biggest flashpoint between the US and China.

"I was personally very opposed to the Pelosi visit," says professor William Stanton, former director of the American Institute in Taiwan. "For a high-level politician from the US to make a visit to the island was just poking China without much reward. And the consequences were quite scary."

Chinese missiles flew over the island as Beijing made blood-curdling threats. In capitals around the region governments began talking seriously about the timetable for a Chinese invasion of Taiwan.

Despite that, as soon as he was elected house speaker this January, Mr McCarthy, a Republican, declared his intention to follow Ms Pelosi's example. But President Tsai decided that was not a good idea, Prof Stanton says.

"I think it was quite clear that Kevin McCarthy wanted to pull a Pelosi," he says. "But Tsai Ing-wen said, 'no thank you, how about we have tea together in California instead'."