An immigration bill needs a broad coalition of supporters to pass, so it will need to offer something for everyone.America has not raised barriers to trade much on Mr Obama's watch, but it has not lowered them either.
Then, in 1995, as part of Newt Gingrich's Contract With America, Congress adopted a law that raised barriers to investor lawsuits.
To entrench their tenuous majority, North Carolina Republicans raised barriers that they knew would disproportionately burden black voters, and they did so because of, not despite, those racial effects.
And yet in nearly 20 states, laws sponsored by incumbent network operators have raised barriers for cities wanting to foster competitive networks.
Already, 19 states have bent to the lobbying influence of established players and raised barriers to the public-private partnerships that would compete with legacy companies.
The spread of occupational licensing, for everything from horse massage to hair braiding, has raised barriers to entry for occupations that once required little or no training.
In response, the government has raised barriers to restrict the inflow of immigrants.
PNs raised barriers to their involvement relating to the logistics of testing, such as being unable to order chlamydia investigations for patients without consultation with a GP.
A report by Mr. Brock's commission notes: "There has been increasing concern that a front-loaded nomination system that ends almost as soon as it begins raises barriers to all but the best-connected and well-funded candidates.
The first assumption envisions that the UK would plainly not reap any gains from free trade; even worse, it would raise barriers against the world as well as against the EU.
The most frequently raised barrier was the number of alerts received by providers.
