Senior Republicans want to channel any investigation through the House and Senate intelligence committees, over which they have greater control. But some Democrats, fearing that the results of such an investigation would never be released to the public, are pushing the formation of an independent body of outsiders modeled on the Sept. 11 commission.

Still other Republicans would like to see a bipartisan investigation in Congress — or better yet, form entirely new congressional committees and subcommittees to dig into the matter. A different group of Democrats would like to see a very unusual bicameral probe into whether Russia allegedly hacked the Democratic National Committee emails and leaked them to WikiLeaks in a concerted effort to damage Hillary Clinton.

The cacophony of competing voices on Capitol Hill could hamstring the rare, near-universal commitment to dig into allegations Russia interfered with the 2016 election. It may also allow Trump to discredit lawmakers’ efforts as overly partisan — the president-elect has called charges that Russia interfered in the election to benefit his candidacy “ridiculous.”