Michael Andretti — American Athlete born on October 05, 1962,

Michael Mario Andretti is a retired American racing driver, who won the 1991 CART PPG Indy Car World Series. A legend in CART, he drove in the series before and after his unhappy Formula One sojourn with McLaren, becoming the third most successful driver in CART history with 42 race victories. Since retiring from the cockpit, his runs his own IndyCar team, which runs his son, Marco Andretti, as well as a team in the FIA Formula E Championship. Andretti is the son of Mario Andretti... (wikipedia)

Running on different types of racetracks is challenging - not only for the drivers, but even more for the team members who have to make adjustments to the cars before each race.
If CART continues on, it's just going to drag all of open-wheel racing down.
CART is one of the safest racing series in the world.
One thing I would like to see is a stronger ladder series for up-and-coming American drivers.
When you're in the back of the pack, you can gamble a little bit more.