imports and as soon as that suggestion came out, republicans started to push back, including lindsey graham of south carolina, john mccain of arizona, john who reported there in this piece raising deep concerns about this idea. immediately afterwards, wolf, the white house starting to walk that back. sean spicer saying this is just one thing they're looking at. they have not embraced this idea. it is just illustrative of the proposals they are looking at how to pay for this wall. not embracing that quite yet. still an open question, but how exactly to pay for this wall that could cost upwards of $15 billion. >> this crisis of mexican-u.s. relations clearly escalating. let's see what happens next. manu raju in philadelphia for us. president trump is following up his unfounded claim of widespread voter fraud by ordering an investigation. our justice correspondent pamela brown has been looking into that. pamela, i take it not much congressional enthusiasm for this kind of investigation?