The Kentucky senator is losing support from some Libertarians.
The support comes despite the New Jersey governor's low poll numbers.
Bernie Becker 09/29/15 12:08 PM EDT
The GOP poll-leader maintains the plan would not add to the deficit.
Cruz wins endorsements from fans of Sen. Rand Paul's father.
Trump says he's worth more than Forbes estimates on its list of richest Americans.
The Kentucky Republican said Congress is a "withering shadow."
Biden also has substantial leads against top GOP candidates.
"Let ISIS and Syria fight. And let Russia ... fight ISIS," Trump said.
Trump is scheduled to appear on Bill O'Reilly's show on Tuesday night.
The bar for the debate was set so low that every major candidate will get in.