The Las Vegas heat appeared to be getting to Donald Trump at a campaign rally over the weekend. The presumptive Republican nominee went on a truly bizarre rant that jumped from recent shark attacks to calling on MAGA supporters to prioritize “suicide over Biden,” RadarOnline.com has learned. Trump’s rallies have developed a reputation for featuring a smattering of random topics mixed with attacks against the ex-president’s adversaries and his personal woes, but his speech at a Las Vegas rally on June 9 was stunning. In one instance, the ex-president bragged about a supporter who had attended o…