Canada tariff pause, Ukraine elections call and OpenAI development slowdown

President Trump pauses Canada tariffs in a preliminary trade deal, former Ukrainian Defense Minister Mykhailo Fedorov calls for wartime elections, The UAE imposes a trade embargo on Iran, over 100 are killed in a gold mine collapse in the Central African Republic, OpenAI slows development after a rogue agent hack, the U.S. ends South Korea drills early, President Trump's pick loses in the Wyoming Governor GOP primary, a judge strikes down the Biden-era ATF ghost gun rule, Brazil's Lula praises a major oil discovery near the Amazon River, and an mRNA cancer vaccine succeeds in a late-stage melanoma trial. Sources: Verity.News