well, tonight, this news, a white house official and an aide to house speaker nancy pelosi have tested positive for covid. both were vaccinated and reportedly came into contact with a group of texas lawmakers who fled to washington last week to make a political point. here s cbs nikole killion. (cheering) reporter: tonight, those texas legislators who fled to washington are trying to contain a covid breakout among their own. we don t regret coming to d.c. at all. reporter: as two new cases surfaced with an administration official and a staffer for house speaker nancy pelosi. both of whom, reportedly met with the texans and were fully vaccinated. the spread forced the white house to defend its own covid protocols, adding, the infected staffer was now working offsite and showing only mild symptoms and acknowledged other breakthrough infections. the white house medical unit has conducted contact tracing interviews and determined no ano cl close contacts among white house principa