The Latest: Trump will lay out his midterm agenda at the State of the Union

President Donald Trump’s State of the Union address tonight at 9 p.m. ET is likely to be a test run of the message Republicans will give to voters in November’s elections for control of the House and the Senate.

The president and his party appear vulnerable, with polls showing much of America distrusts how Trump has managed the government in his first year back in office. In addition, the Supreme Court last week struck down one of the chief levers of his economic and foreign policy by ruling...