I believe we should search out the truth and defend that. Defending candidates on general principles is very dangerous. Sometimes you wind up holding a bag with something rotten.
That said holding fire until you have all the facts and taking everything in the media with 10000 grains of salt is also good policy before defending or attacking.
That, of course, was never explained by the media. That is what they do to conservatives. Either not tell the story or only give the half of it.