washington u.s. lawmakers party say sunday see proof support claim republican president donald trump predecessor barack obama wiretapped last year add pressure trump explain back repeat assertion several republicans last week urge trump apologize allegations make series tweet march 4. maelstrom also cause tension key u.s. ally threaten distract republicans campaign promise health care tax know basis president trump assertion u.s. senator susan collins republican say nbc meet press believe owe us explanation collins say support trump president side misstate facts be fbi director jam comey expect ask trump claim testify rare public hear monday allege russian meddle 2016 presidential election russia deny assertion involve hack email attempt influence race representative adam schiff top democrat house intelligence committee hold hear call trump claim patently false say expect comey say much monday justice department friday deliver document congressional committees help clear whether obama administration spy trump republican representative devin nunes lead house intelligence panel say receive material saw evidence wiretapping nunes serve trump transition team join white house seek shift attention away controversies call investigations leak news media nunes say fox news sunday leak reporters former trump national security adviser michael flynn criminal panel probe whether name leak trump dog allegations associate tie russian officials fire flynn last month report discuss sanction russia ambassador trump take office without tell white house officials one crime know commit one leak someone name nunes say name ... leak nunes also say ahead monday hear see evidence collusion russia trump team schiff panel top democrat say enough circumstantial evidence still question meanwhile white house back trump surveillance claim administration force reassure key ally britain white house press secretary sean spic repeat fox news analyst claim british intelligence agency help obama wiretap trump british government strongly deny issue lead awkward moment friday joint press conference visit german chancellor angela merkel trump ask wiretap claim german reporter trump say merkel something common apparently refer report obama administration merkel phone bug quip leave german leader look bewilder senior republican representative tom cole tell reporters friday trump owe obama apology representatives charlie dent hurd also republicans make similar comment see indication true cole say wiretapping charge unless trump produce convince proof cole add president obama owe apology pressure build trump back wiretap accusations