Two of President Joe Biden 's top goals — fighting climate change and expanding the middle class by supporting unions — are colliding in the key battleground state of Michigan as the United Auto Workers go on strike against the country's biggest car companies.
The strike involves 13,000 workers so far, less than a tenth of the union's total membership, but it's a sharp test of Biden's ability to hold together an expansive and discordant political coalition while running for reelection.
