GOP grumbles as Trump reshapes midterm campaigns

President Donald Trump's strategy of becoming aggressively involved in the midterm elections is prompting concern among some Republicans who worry he's complicating the political calculus for GOP candidates trying to outrun his popularity....

...there are some signs that Trump's unpopularity with the general electorate may hamper more than help individual Republican candidates....

"Clearly he lights the fire when it comes to energized Democrats," said Ohio Democratic Party chairman David Pepper. "He's going to come and give a rambling, over-the-top speech that has nothing to do with this district or Troy Balderson. It may hurt more than it helps."

...The president's decision to intervene in recent GOP primaries is also raising concerns among some state party officials and politicians, who fear he's siding with candidates who could prove weaker in general elections. Trump has relished doling out endorsements, sometimes blasting out several a day — even for those who don't need his backing right now....