What was president regan’s goal when he said: “general secretary gorbachev, if you seek peace, if you seek prosperity for the soviet union and eastern europe, if you seek liberalization: come here to this gate. mr. gorbachev, open this gate. mr. gorbachev -- mr. gorbachev, tear down this wall! ”

Reagan is trying to motivate the crowd to agree with him and support the argument of tearing down the Berlin wall. He is addressing Gorbachev by presenting options that are difficult for a politician to disagree with (who is going to outright say they don't want peace?), so that the audience will be able to accuse him of not wanting peace if he does not tear down the wall.