Will Spouses of Presidential Candidates Compete in Gardening?

That's the question raised in my mind by this piece on the different gardens of the wives of the candidates for Prime Minister in Britain. It seems it's the "in" thing to garden there.  Now in the US Michelle may have given more prominence to gardening with her White House garden.  But I don't remember in past elections there was any direct competition among the candidates wives.  There's always speculations about what they'll do in the White House, and comparisons of their lives and careers before the election, but no further.