Miami: Democratic presidential hopeful Bernie Sanders on Wednesday strongly defended his plan to offer free tuition at public colleges. During Wednesday's Democratic debate in Miami, Sanders said that even those who could pay should be allowed to get free tuition - like, for example, the children and grandchildren of Republican front-runner Donald Trump.

"Absolutely! Trump's progeny should get free tuition at a state school," Sanders said. "I don't think they will. But Donald Trump's kids can go to public school free. . . . We are going to get to Donald Trump by raising the taxes on the top one percent, and millionaires and billionaires."

It is interesting to note that the free tuition plan floated by Sanders call for the tuition to be funded by new taxes on Wall Street trades.

Responding to Sanders' plan, his main rival Hillary Clinton said that the senator plans to offer free tuition and universal government-run health insurance will be very costly and it is highly unlikely that the Congress would pass it.

"This is going to be much more expensive than anything Sen. Sanders is admitting to. This is going to increase the federal government dramatically," Clinton said. Quoting her own father, a staunch Republican, Clinton said: "If it sounds too good to be true, it probably is."

For his part, Sanders said that Clinton had given up even before joining the fight: "If the rest of the world can do it, we can," Sanders said.

Earlier, Clinton surprised everyone by making a personal admission of her political failings during the debate, saying that politics "isn't easy for me." "I am not a natural politician, in case you haven't noticed, like my husband or President Obama, so I have a view that that I have to do the best I can," Clinton said, in a response to a question from moderator Karen Tumulty about why Clinton is considered untrustworthy by so many voters.