As a general rule, politicians don’t pick fights with their state’s biggest private employers, but Seattle Congresswoman Pramila Jayapal is doing just that, sponsoring legislation that would break up Amazon.Jayapal’s Ending Platform Monopolies Act is part of a broader, bipartisan effort in Congress to rein in the power of the Big Four tech giants: Amazon, Facebook, Apple and Google.Following up on a 16-month antitrust investigation completed last fall, House lawmakers this month unveiled five antitrust bills aimed at checking the power of the companies by limiting their abilities to gobble up or hamstring competitors.Jayapal’s proposal would allow the federal government to sue to force the Big Four tech firms to sell off lines of business deemed a “conflict of interest.” That would mean Amazon could no longer run its marketplace for third-party sellers while also competing against them with its own products. Similar divestments would be required of the other top tech firms, and all could face massive daily fines for noncompliance.