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A Russian tanker blocking access to the Kerch Strait, Nov. 25. Photo: Alexei Pavlishak/TASS/Getty Images

Ukraine claimed that Russia opened fire on its navy ships in the Kirch Strait, a sea passage between Crimea and Russia's mainland, on Sunday, damaging one and escalating the ongoing Crimean crisis, per the AP.

The big picture: The standoff led Ukrainian President Petro Poroshenko to convene his military cabinet. Russia earlier blocked access to the strait after it claimed Ukrainian naval vessels ventured into Russian waters. Ukraine claims it gave Russia advance warning about the movement of its navy ships. Russia's blockade of the strait with a tanker effectively cuts off sea access for Ukrainian cities that lie on the Sea of Azov, reheating the geopolitical crisis that kicked off with Russia's annexation of Crimea in 2014.

Go deeper

Updated 2 hours ago - Politics & Policy

Senate pulls all-nighter on amendments to COVID relief package

Photo: Alex Wong/Getty Images

Democratic leaders struck an agreement with Sen. Joe Manchin (D-W.V.) on emergency unemployment insurance late Friday, clearing the way for Senate action on President Biden's $1.9 trillion stimulus package to resume after an hours-long delay.

The state of play: The Senate continued to work through votes on a marathon of amendments overnight into Saturday morning.

The elusive political power of Mexican Americans

Data: Pew Research Center, U.S. Census Bureau; Chart: Michelle McGhee/Axios

Mexican Americans make up the nation's largest Latino group, yet they remain politically outshined by more recently arrived Cuban Americans.

Why it matters: The disparities in political power between Mexican Americans and Cuban Americans reflect the racial, historical, geographical and economic differences within Latino cultures in the U.S.