Back when Democratic enthusiasm was the story of California's June primaries, Republicans argued they'd be able to bank on widespread opposition to the state's gas tax to turn their voters out in the fall.
Now, more California GOP groups and candidates are highlighting the push to repeal the gas tax, which will be decided on the November midterm ballot.
On Tuesday, the National Republican Congressional Committee released a new digital ad that uses the issue to hit Democrat Katie Hill, who is running against GOP Rep. Steve Knight.
"Come November, Californians will turn out in droves so Democrats like Katie Hill don't make the cost of living even more crippling," NRCC Spokesman Jack Pandol said in a statement announcing the new digital ad.
Porter is facing off against GOP Rep. Mimi Walters, and she's already out with a new ad that blasts the CLF spot as a "straight up lie" because "I oppose higher gas taxes.
And while some Democrats are hoping to knock of GOP Rep. Devin Nunes because of frustration of how he's handled his time chairing the House Intelligence Committee, Nunes's television ads have been all about the gas tax.
Democrats brush aside the GOP's arguments about the gas tax as too small of an issue to overcome the bevy of potential potholes the GOP could face in the fall.
John Vigna, a California Democratic Party spokesman, told the Los Angeles Times in April that "Republicans are deluding themselves if they think this is a silver bullet that will save them from the Trump-sized anchor weighing them down."
And Democrats have their share of chances in California.
Five GOP seats are listed as toss-ups by the Cook Political Report—seats currently held by Reps. Jeff Denham, Steve Knight, Ed Royce, Mimi Walters and Dana Rohrabacher—while retiring Rep. Darrell Issa's seat is rated "lean Democratic."
The seats belonging to GOP Reps. Tom McClintock and David Valadaeo are rated "likely Republican."
So as Democrats continue to position themselves to make gains on the West Coast, Republicans are making good on their June messaging and beginning to explicitly connect GOP candidates with the repeal effort.