GOP insiders 'shaking their heads' after angry Trump puts Senate seat at risk: report

Republicans are increasingly concerned about maintaining Senate control in the upcoming midterm election, expressing frustration that Donald Trump is undermining their efforts.

The party faces challenging circumstances. While poor approval ratings—partly attributable to the president's inability to address cost-of-living concerns—make House losses likely, Republicans have remained confident about retaining the Senate.

That confidence has wavered following Trump's attacks on five...