Donald Trump is planning a major address next week in which he says he'll reveal how Bill and Hillary Clinton have underhandedly used politics to rake in "hundreds of millions of dollars" for themselves.The speech, which the billionaire real-estate tycoon and presumptive GOP presidential candidate says he'll likely deliver on Monday, will be Trump's first sweeping assault on the Clintons since Hillary won the crucial California primary on Tuesday."We can't solve our problems by counting on the politicians who created our problems,"at his 140-acre Trump National Golf Club in Briarcliff Manor, New York."The Clintons have turned the politics of personal enrichment into an art form for themselves. They've made hundreds of millions of dollars selling access, selling favors, selling government contracts. And I mean hundreds of millions of dollars."I am going to give a major speech on probably Monday of next week. And we are going to be discussing all of the things that have taken place with the Clintons. I think you're going to find it very informative and very, very interesting."Trump did not provide further details about what he plans to reveal.He added: "Recent polls have shown that I'm beating Hillary Clinton. And with her many problems, and tremendous mistakes that she's made, and she has made tremendous mistakes, we expect our lead to grow, and grow substantially.Flanked by his wife Melania and daughter Ivanka, Trump then fired a shot at the media, with which has had a growing combative relationship."I wonder if the press will want to attend? Who knows?" Trump asked.He also extended an olive branch to supporters of Sen. Bernie Sanders — who despite saying he'll remain in the race through the Democratic National Convention, has zero-to-little chance of taking the nomination away from Hillary Clinton."To all of those Bernie Sanders voters, who have been left out in the cold by a rigged system of super delegates, we welcome you with open arms," Trump said.