Elon Musk spent nearly half a billion dollars on the U.S. midterm elections, but the record expenditure yielded little for the world’s richest man and leader of SpaceX and Tesla.

Just three of the 37 Republicans Musk backed for the House of Representatives won on Tuesday night, compared to 33 who lost. The remaining race had not been called by Thursday afternoon, though a Republican was running ahead in tallies so far.

Of the seven Senate Republican candidates Musk backed, six lost and one race hangs in the balance. In that last race, Alaska, Democrat Mary Peltola was narrowly ahead with 78% of votes counted.