those briefings come as canadian police today are launching a crackdown on those truckers. they've arrested several protesters who have kept downtown ottawa basically stuck in gridlock, including two leaders of the protest. we have ken delaney. talk to me about the warning that members of congress are getting from capitol police. >> reporter: hallie, multiple sources are telling our team that capitol police were briefing staff on the house administration and senate rules committee. coming of course, after those trucker protests disrupted the canadian capital and shut down detroit and the canadian city of windsor. these canadian protests began in opposition to vaccine and mask mandates, and some republican lawmakers here have praised those protests. now fox 5 d.c. is reporting that metropolitan police officers were told they would not be able to take time off between february 22nd and march 5th as authorities geared up for a protest convoy.