President Joe Biden vowed during his 2020 campaign to restore America’s alliances and leadership abroad. But if Biden’s foreign policy served as an effective contrast with Donald Trump’s “America First” isolationism that year, it has now become a liability for his 2024 campaign. As Biden begins a month of high stakes international meetings with a trip to France this week, two bloody wars in Ukraine and Gaza have complicated the president’s job and, polls show, contributed to the shakiness...