Donald Trump launched a fresh attack against Vivek Ramaswamy this week, RadarOnline.com can report. The embattled ex-president’s latest attack against his GOP primary challenger came on Monday morning – just hours before the all-important Iowa caucuses were set to kick off in the Midwest state on Monday night. According to Trump, a vote for Ramaswamy is a “wasted vote.” The impeached former president also claimed that Ramaswamy “played it too cute” with Trump’s 2024 presidential campaign. “A VOTE FOR VIVEK IS A WASTED VOTE,” the 45th president wrote on Truth Social just after 7 AM on Monday mo…