From the article:
Voters who chose “uninstructed delegation” in Wisconsin’s presidential primary Tuesday more than doubled the 20,000 votes President Joe Biden won the state by in 2020, sending warning signs for his reelection chances in the battleground state.
Voters displeased with Biden’s handling of the Israel-Hamas war organized into a “Listen to Wisconsin” campaign that mirrored other states like Michigan and Minnesota, where a similar “uncommitted” option took about 13% and 19% of the vote in the Democratic primary, respectively.
In Wisconsin, “uninstructed delegation” represented 9% of the vote on the Democratic side as of 10:15 p.m., taking about 42,269 votes. Around 408,610 voters have selected Biden as their choice, or 88%. About 3% voted for Minnesota congressman Dean Phillips, who has ended his campaign and endorsed Biden.
My understanding is that some of the benefits China would get from invading Taiwan is the control of Taiwan’s world-leading semiconductor industry. So making it public knowledge that any invading force (i.e. China) would not be able to take over their production capabilities is a small deterrent.