washington u.s. senate democrats plan enlist accountants legal experts pore business record exxon mobil chief executive rex tillerson president-elect donald trump pick secretary state democratic aid say tillerson could face rocky confirmation process give concern among democrats republicans tie russia tillerson overcome skepticism republicans could win confirmation since party control slim majority senate trump take office jan. 20. democrats misgive tillerson go well beyond worry might accommodate toward moscow see risk conflict head 380 billion oil giant become nation top diplomat want ensure personal wealth business interest get close scrutiny aid say democrats begin assemble experts prepare tillerson confirmation even nomination formally announce tuesday bring people confirmation battle democratic leadership aide say want thorough review comfortable process take long need many ways exxon operate kind diplomatic corps dispatch executives network government officials 40 countries company operate scale reach exxon mobil ... raise question relationships experience helm exxon mobil influence decision-making secretary say democratic senator chris coons member senate foreign relations committee hold tillerson confirmation hear next month tillerson 64 new york time list 200 highest-paid ceos earn 24.3 million 2016. net worth 150 million plus 70 million pension plan would likely need divest hold exxon stock democrats also consult foreign affairs experts examine relationships countries russia tillerson oppose sanction impose russia annexation crimea say often ineffective exxon say sanction russia could cost hundreds millions dollars look issue like need recuse decisions sanction another democratic aide say exxon also come attack financial arrangements oil production chad company lawyers negotiate 74 billion fine tie accusations royalty underpayment exxon also development right iraq battle islamic state saudi arabia controversial record human right complex relationship u.s. ally israel iran whose international nuclear agreement sign president barack obama harshly criticize trump mr tillerson demonstrate know corporate world put shareholders interest first respect secretary state put national security interest american people first ask senator ben cardin rank foreign relations committee democrat tillerson enjoy strong support republican leaders party members offer mute reactions marco rubio republican member foreign relations panel run trump republican presidential nomination say serious concern tillerson nomination even critics say however open appointment tillerson give satisfactory answer confirmation process lot ways energy energy dependence influence foreign policy decades hopefully bring insights result experience coons say bad get 40 years experience globally business add democrats enlist experts scour tillerson 's business record