Four Republican Senate candidates from battleground states avoided discussing the war with Iran and tariffs during the first day of President Trump’s convention in Dallas. Both issues have created political difficulties for Republicans, with polls showing voter frustration, particularly over rising prices linked in the source to Mr. Trump’s decisions. The candidates instead praised his tax and spending law, endorsed him in other ways and portrayed their Democratic opponents as extreme. Mr. Trump urged voters to view the election through his presidency, saying, "Pretend I’m on the ballot." Texas Attorney General Ken Paxton, who benefited enormously from Mr. Trump’s backing in a contested Republican primary, delivered some of the strongest praise.