Trump said that Romney fails to appeal to the Republican base and as such would lose yet again. “Many Republicans stayed home,” Trump said of 2012. “If the Republicans came out and voted, he would have won…John McCain actually got more votes than Mitt Romney.”
http://www.breitbart.com/Big-Government/2014/10/21/Exclusive-Donald-Trump-To-Mitt-Romney-You-Blew-It-In-2012-Don-t-Even-Think-About-Running-Again