Billionaires are putting their influence and money behind Donald Trump, a wave of support that is helping the former President narrow his fundraising gap with President Joe Biden. The latest example came last week with the news that Blackstone CEO Steve Schwarzman, after years of keeping his distance from Trump, is now a supporter. A collection of familiar GOP names announced their support for Trump in recent months. They include figures like Robert Bigelow and Nelson Peltz. Both have donated to Republicans for years. Both distanced themselves from Trump after Jan. 6. Both are now back on board. Robert Bigelow,...