Former White House adviser Kellyanne Conway desperately tried to defend Republican presidential nominee Donald Trump Tuesday after he could not stay on topic during what was supposed to be an economic speech in Georgia. After Trump talked in Savannah for over 80 minutes, Fox News host John Roberts noted that the former president spoke three times longer than expected. “That was quite a speech, almost an hour and a half,” Roberts said. “I was following along with the prepared text, and I think the speech was three times as long as the prepared text because he kept ad-libbing and deviating so mu…