Summary Republicans hold advantage with control of 23 state legislatures Democrats threaten retaliation with their own redistricting efforts Population shifts favor Republican states, impacting future congressional seats WASHINGTON, Aug 24 (Reuters) - President Donald Trump's push for Republican-led states to redraw their U.S. House of Representatives districts to protect their majority in next year's midterm elections could set the stage for Republicans to dominate the chamber in decades to come, political analysts and experts said.Republicans hold a 219-212 House majority and Trump is looking to break the streak of midterm House losses for the sitting president's party -- as happened...