A gathering of GOP presidential candidates before major donors on Thursday prompted predictable condemnations of President Barack Obama's foreign policy and a surprise bill of attainder against the Republican Party.

In an appearance before the Republican Jewish Coalition forum in Washington, billionaire Donald Trump predicted that "you are not going to support me because I don't want your money even though I'm the best thing that could ever happen to Israel" as he gave a stump speech filled with insults about his rivals that had the audience at times laughing like a crowd at a comedy club. "I'm gonna win," said Trump, who bragged about coining the term "low energy" for competitor Jeb Bush. He seemed to be preparing a similar line against Democratic front-runner Hillary Clinton.

"She doesn't have the strength or the energy to support Israel," Trump said, contending that Clinton disappears from the campaign trail for three or four days at a time. The former secretary of state is appearing Thursday in New Hampshire, during a week of public appearances that has taken her to Washington, Alabama and Florida. On Friday, Clinton will make two appearances in Iowa.