WASHINGTON - Former Sen. Conrad Burns is no longer part of a federal investigation of jailed lobbyist Jack Abramoff, the Justice Department said Wednesday. Burns, R-Mont., narrowly lost re-election to a fourth term in 2006 after Democrats made his relationship with Abramoff a central issue. Abramoff is the key figure in a corruption investigation that has led to convictions of a former congressman, legislative aides, lobbyists and officials in the Bush administration. Burns said in a statement that he "never doubted that the baseless and politically motivated charges leveled against me would be found to be without merit." "My family...