For Taiwanese Americans, voting back home has taken on greater urgency

TAINAN They are some of the most determined voters in the world.

Every four years, several thousand Taiwanese Americans book expensive plane tickets, pack their belongings and fly across the Pacific Ocean to cast ballots in Taiwan's presidential election.

Dual citizens can vote in Taiwan, with one catch: They cannot do so by mail.

What once felt like a patriotic duty has taken on greater urgency in recent years as China has intensified military pressure on Taiwan and doubled down on threats to absorb the island by force if it considers it necessary.

The increasing tensions have become an additional flashpoint in US-China relations.

"Freedom and democracy are on the line," said Ms Leslie Lai, 42, who had travelled from her home in Oakland, California, to Taichung, a city in central Taiwan, where she spoke by phone before the Jan 13 election.

For many first-generation Taiwanese Americans, the quadrennial journey back to Taiwan has become something of a diaspora tradition since 1996, when the island held its first democratic presidential election.

Ms Lai said that as a child in upstate New York, she was always vaguely aware of the latest devel opments in Taiwanese politics and would watch her parents fly back themselves to participate in presidential elections.

The desire to still vote in homeland elections speaks to the fluid identity that many immigrants embrace in an age of air travel and non-stop campaign updates through social media and streaming video.

They are fully invested in their lives in America, including bracing for the monumental US presidential election in November, yet retain a toehold overseas.

All three of the main presidential candidates have visited the US in the last six months, partly to shore up diaspora support.