The 30-second ad, dubbed "Principles," portrays Strickland as a conservative in the Ronald Reagan mold dedicated to "getting government out of our way and out of our pockets so we can grow our economy."
In the ad, Strickland promises to fight for the repeal of the Affordable Health Care Act, "real cuts" in spending and a balanced budget amendment.
Strickland is one of eight candidates on the ballot in the 25th Congressional District. His main competition is generally thought to be Republican state Sen. Steve Knight of Palmdale.
Although Democratic registration has been growing in the district, it still leans Republican.
McKeon announced earlier this year that he will retire at the end of his term and has endorsed Strickland.