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Critics say president should focus on problems at homeSign up to receive First Thing – our daily briefing by emailGood morning, US politics blog readers. Washington was jolted this weekend when its most famous resident Joe Biden snuck out of town and made a secret visit to Ukraine’s capital to reassure President Volodymyr Zelenskiy that America had its back. Kyiv’s cause remains widely popular in Congress among the leaders of both the Democratic and Republican parties, but figures on the GOP’s fringes attacked the president for leaving while the United States faced its own crises. The loudest voice making these accusations was Florida’s Republican governor Ron DeSantis, who is widely expected to soon run for president and implied Biden would have been better off worrying about the security of America’s border with Mexico.Here’s what we can expect today:Biden is in Poland, where he’ll mark the one-year anniversary of Russia’s invasion of Ukraine with a speech at 11.30am ET.The supreme court will today hear the first of two cases in which justices will consider whether tech companies should be liable for the content their users post. The court’s decision here could have major consequences for online speech.No votes are expected in the House and Senate until next week. Continue reading...