A disciplined, Republican-controlled Congress has avoided official rebuke from President Bush since he took office almost four years ago.
Bush is the first president in 100 years not to veto a single bill proposed to him by Congress.
Though this record is striking, policy expert David Almasi said the explanation for it is simple: the Republican majority in both chambers of Congress.
"It's not like he's getting bills he has a predilection to dislike," said Almasi, executive director for the National Center for Public Policy Research.
"Theoretically, by the time something gets to his desk, it's going to be what he wants."
Before Bush took office, presidents had a history, dating back to the presidency of Ronald Reagan, of facing an opposition majority in Congress, he said.
UNC political science professor George Rabinowitz said that Republican leaders, striving to escape a legacy of decades of settling for minority status, have been working to ensure party solidarity since the 1980s, capitalizing on a public shift toward conservatism.
"(The Republicans) really changed the rules by which the House operates," he said. "The leaders are in a better position to reward those who comply with them and punish those who don't."
John Samples, an analyst for the Cato Institute, a nonprofit public policy research foundation in Washington, D.C., said the relationship between Bush and Congress is a two-way street.