Newark Mayor Cory Booker took another step toward the Senate on Tuesday when he easily won the Democratic nomination in New Jersey. Republican nominee Steve Lonegan isn't expected to be more than an also-ran against Booker, meaning the Newark mayor has basically punched his ticket to Washington.

What kind of senator would Booker be? From the get-go, he would be poised to become the highest-profile member of the Democratic Caucus. While the Senate Republican roster is filled with rising young conservative stars such as Sens. Rand Paul of Kentucky, Marco Rubio of Florida and Ted Cruz of Texas, none of whom is camera-shy, Senate Democrats don't boast the same kind of new electric personalities.

Wait just a second, you say. What about Sen. Elizabeth Warren, who has a huge liberal following, a record of taking on Wall Street and the ability to raise more money than just about anyone? All true. But Warren has largely eschewed the spotlight, and has deliberately kept a low profile during her first few months on Capitol Hill.