How Come Hillary Didn't Sue?

Melania Trump just got a public apology and an undisclosed amount of cash from some leftist idiot who libeled her on his web site. He couldn't prove a thing he wrote and now has to pay for his actions.

From the NY Post:

Melania Trump has won a “substantial” amount of money in a settlement with Maryland blogger who wrote about claims that she had once worked as a prostitute.

“The First Lady of the United States has settled her lawsuit against Webster Griffin Tarpley of Maryland,” said Matthew Blackett, one of Mrs. Trump’s attorneys.

“Mr. Tarpley has issued the attached retraction and apology to Mrs. Trump and her family, and agreed to pay her a substantial sum as a settlement,” Blackett said in a statement.

Of course this begs the question, why hasn't Hillary Clinton sued the crap out of everyone who bad mouthed her during the election? She was torn to pieces by the right leaning blogosphere - perhaps what they wrote was all true?