Several thousand Spanish leftists, protesting the visit of President Reagan, crowded across a main boulevard of Madrid during rush hour Tuesday evening, burning American flags and snarling downtown traffic for more than two hours.
The demonstration was the most dramatic of several that have marred the visit since the President's arrival Monday. However, it was much smaller than the marches of an estimated 75,000 protesters in Madrid and several hundred thousand in other Spanish cities on the eve of his arrival.
"There . . . has been quite a demonstration of extreme friendliness as the President's motorcade has gone around through the streets of Madrid and through the road that leads out to where he's staying-large crowds, very friendly, smiling and waving . . . American flags. . . .