Donald Trump will be doing a great deal of juggling on his 2024 calendar. The presidential frontrunner moved closer to winning the GOP nomination with his victories in Iowa and New Hampshire — former South Carolina Gov. Nikki Haley is now the only other Republican candidate left in the race — but he will be juggling campaign events and legal problems, which range from four criminal indictments to a range of civil lawsuits. In New York City, Trump is on trial in writer E. Jean Carroll’s second civil defamation lawsuit against him. A jury awarded the former Elle Magazine columnist $5 million in …