Sri Lanka, Feb. 25 -- U.S. President Donald Trump will deliver the traditional State of the Union address to Congress on Tuesday at a fraught moment for his presidency, with his approval ratings slumping, anxieties rising over Iran, and Americans struggling with the cost of living as the November midterm election nears.

The televised prime-time speech to Congress, his second in the 13 months since returning to the White House, offers Trump a chance to persuade voters to keep Republicans in power. But it comes as he faces stiff political headwinds at home and abroad.

The appearance follows a turbulent few days for his administration, including a Supreme Court decision invalidating his global tariff regime and new data showing the economy...