Tariffs: California’s building industry is warning of short-term pricing disruptions to construction materials with 25% tariffs on Canada and Mexico. Beginning Tuesday, companies bringing products into the United States from Canada and Mexico will pay a 25 percent tariff; importers bringing products in from China will pay an additional 10 percent on top of existing levies. DeepSeek: When lots of people are worried about bubble valuations in stocks or a specific sector, all it takes is a small poke to make the whole thing wobble precariously. Why it matters: That can cost investors $1 trillion or more in a single day, as happened Monday with the global AI rout. It can also challenge the fundamental assumptions behind an entire economy, like the nascent Trump administration's push to invest hundreds of billions of dollars in American AI supremacy. Why not just ban it like we did TikTOK?: With the sudden advancement of China’s Deepseek R1 Artificial Intelligence model, the US is left scrambling to catch up and trying to figure out if China cheated. That leaves some wondering if the US can just 86 the Chinese product?