Trump is telling voters the economy is the best ever, but Republicans are seeing their own base lose enthusiasm ahead of the midterms — bad news for the GOP.

• Only about 1 in 5 Americans rate the economy as good, and nearly 3 in 5 say Trump is making them financially worse off.
• Gas and grocery prices are the main pain points; a three-time Trump voter in Iowa called his votes "the worst mistakes of my life."
• Grocery sales are shrinking as people buy fewer items, even with prices still rising — a sign shoppers are tapped out.
• A Koch-linked group's door-knocking found 1 in 5 Republican voters may stay home or flip to Democrats, and Democrats lead by 10 points among those certain to vote.
• New tariffs on generic drug imports could raise costs, undercutting Trump's claim of cutting drug prices.

Outlook: With prices still climbing and no economic turnaround in sight, Republicans look set to struggle in November's midterms.