WASHINGTON — The protester dressed as a gigantic, orange EpiPen injector was sent to Sen. Joe Manchin’s photo op last month as a reminder from Republicans: The vulnerable Democrat from West Virginia should expect his daughter’s company to be a campaign issue at every stop along his road to re-election.

But Manchin — the father of Mylan CEO Heather Bresch, whose company is now infamous for its EpiPen price hikes — may have caught a break in Tuesday’s primary. West Virginia Attorney General Patrick Morrisey, the GOP nominee to challenge him in November, is no less entangled in the pharmaceutical world.