Do women get only 80 percent of the pay men do for the same job?

Article here. Excerpt:

'On April 10 -- Equal Pay Day -- Sen. Tina Smith, D-Minn., tweeted out her support for an end to differential pay for men and women.

Her tweet said, "It’s completely unacceptable that, on average, American women only earn 80 cents for every dollar a man earns for doing the same job. And the #paygap is even greater for most women of color. #EqualPayDay"

But there’s a problem: The statistics showing that women earn 80 percent of what men earn are overall comparisons and do not specifically compare men and women occupying the same jobs.

After we reached out to Smith’s office, she sent a new tweet to correct her earlier misstatement.'