 Participants will be randomly assigned to one of 2 types of treatment: either aspirin alone or the combination of aspirin and clopidogrel. In addition, participants will be assigned to one of 2 groups of blood pressure control. The difference between the two groups is the target level of systolic blood pressureeither 130-149 or below 130. The goal of the blood pressure aspect of this trial is to find out if lowering blood pressure after stroke helps to prevent recurrent stroke and preserves cognition. 