Jim Bob Duggar Loses State Senate Primary Race in Landslide

Jim Bob Duggar won't be serving as an Arkansas state senator anytime soon, because he got crushed in the Republican primary ... just days after his son, Josh, was convicted in his child porn trial.

The "19 Kids and Counting" star got clobbered during Tuesday's special election ... which saw him going up against other Republicans for an open state senate seat. The numbers are brutal ... Duggar only raked in about 15% of the vote, while former Springdale City Councilmember Colby Fulfer ended up the victor, with a decisive 46%.

Timing of the election couldn't have been worse for Duggar ... coming the week after Josh was found guilty of possessing tons of child pornography. Hard to say how much of a factor that was for voters, but this is exactly what his own son-in-law predicted would happen.

You'll recall ... Derick Dillard, who's married to Jim Bob's daughter, Jill, told us he thought Josh's conviction would hurt his father-in-law's chances -- and sure enough, he seems to have been right. Derick also happened to endorse Fulfer.