Washington (CNN) Super Tuesday was not so super for Vermont Sen. Bernie Sanders. He lost most of the states up for grabs, and it's quite possible that he'll end up with fewer delegates on the evening than chief rival former Vice President Joe Biden.

Sanders' struggles reflect an inability to connect with older voters, while at the same time failing to generate large youth turnout.

We saw a very familiar age gap across the Super Tuesday states. Sanders crushed it with younger voters. Looking across all the contests with an exit poll , Sanders won an astounding 61% to Biden's 17% among voters under 30 years old. He even beat Biden by 20 points (43% to 23%) among those between 30 years old and 44 years old.

Sanders, however, struggled mightily with older voters. Biden won by 22 points (42% to 20%) with voters 45 years old to 64 years old. With senior citizens (those 65 years and older), Sanders managed to come in third with 15% (behind Biden's 48% and former New York City Mayor Mike Bloomberg 's 19%).

Now you might be tempted to look at those numbers and see that Sanders won those under 45 years old by more than he lost those 45 years and older.

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