Keller @ Large: Lying Isn't A Good Look, Candidates

BOSTON (CBS) -- Tonight at 11 on WBZ-TV, I've got another installment in our series looking at where the candidates stand on the top issues.

This week, it's income inequality, and we lead off the report with a clip from the candidate who has made that issue central to his campaign, Bernie Sanders, whose stump speech includes the claim that "this country has more income and wealth inequality than any major country on earth."

But when you fact-check that assertion, it doesn't hold up. According to the World Bank, 41 other countries have worse inequality, including Mexico and Russia.

Does that false assertion make Sanders a liar?

I wouldn't go that far, but it seems many other candidates and voters have no qualms about slapping that derogatory adjective on others.

If Hillary Clinton had ten bucks for every time she's been called a liar, deservedly or not, she wouldn't need to be giving those big-dollar speeches.

Marco Rubio gets trashed as a liar and traitor by people for the crime of having tried to fix a problem in a way they disapprove of.

Ted Cruz's campaign got caught playing dirty politics in Iowa, but some of the lies he's now being accused of telling sound more like valid questions about his opponents' records.

And then there's Donald Trump, who called Cruz a liar more times than I could count in a press conference yesterday.

This is amusing, coming from the candidate who won the fact-checking website Politifact's Lie of the Year award last year for his chronic disregard for facts and truth.

Memo to all candidates: this is not a good look, not the lying or the finger-pointing.

And if voters swallow it, it's not a good look for us, either.

Listen to Jon's commentary: