I may be using ‘subtle’ in a somewhat ironic fashion.
Mark Reed is running in a redrawn district featuring incumbent Democrats Brad Sherman and Howard Berman. Come, I will conceal nothing from you: dropping a nuke in your campaign ad is, shall we say, controversial. On the other hand, Reed has absolutely nothing to lose in provoking Sherman & Berman into having a fight over who is more pro-Israel, which they were going to do anyway. On the gripping hand, I linked to it, didn’t I? Means it worked, more or less.
PS: If you’re wondering, the primary is nonpartisan and the top two candidates go to the general. The polling is old and suspect, but suggests that Reed has a shot at second place. Interesting days.