against backgroud vs against backdrop

Some examples from the web:

• Against this background I have voted against the report.
• Against this background, MEPs strongly support the Commission in the WTO dispute settlement procedure against South Korea.
• Voted against background checks, against Obamacare, against the jobs bills, student loans, TARP, the auto bailout.
• We must assess Budget 2000 against this background.
• Against this background both reports are extremely useful.
• Against this background, the following aspects are worth considering.
• Against this background, two conclusions emerge.
• Broad strategy, against a fast changing background...
• Against this background, the argument is therefore rejected.
• Against this background the European Union, in spite of its imperfections, is a heroic endeavour undertaken against great odds.
• Against this background, imposing stricter sanctions against Belarus unfortunately seems to be the only possible response to recent events.
• Against this background, MEPs strongly support the Commission in the WTO dispute settlement procedure against South Korea.
• Against this background I caution against any attempt to radically alter the administration and structure of the agricultural budget agreed in Berlin.
• Dagny's an upper-class girl rebelling against her background.
• Resistance against potentiated sulphonamides may vary.
• Specifically at the moment, 100 cases are running against Globus, 45 against Feral Tribune, 32 against National, 51 against Novilus.
• These symbols shall stand out clearly against the background, either bright against dark or dark against bright.
• BACKGROUND INFORMATION Ciprofloxacin Nycomed and associated names, 2 mg/ ml Solution for Infusion, is an antibiotic belonging to the quinolone family effective in vitro against a large number of Gram-negative aerobic bacteria as well as against some Gram-positive organisms.
• This is the background against which the fight against illegal immigration must in future be fought.
• Against this background, it is necessary first of all to define the standards against which to gauge the suitability of the Commission proposals.

Some examples from the web:

• That and anything set against the backdrop of competitive cheerleading.
• Against this backdrop, the directive on investor compensation schemes takes on further topical significance.
• Against the backdrop of these positive results, I give the adjustment my full support.
• Against this backdrop, I find the Olsson report very positive.
• The decline in inflation should be seen against the backdrop of robust economic growth.
• Against this backdrop, the report highlighted three key points.
• Against this backdrop, the present Common Resolution meets the most significant concerns and makes some highly relevant points.
• Against this backdrop, I should like to highlight two issues that strike me as highly important.
• All this is happening against the backdrop of a grave situation.
• Against this backdrop, four priority areas have been established for 2006-7.
• Against this backdrop, some fundamental criticism must be made of the Commission proposals.
• It is against this backdrop that I support the Martin report.
• Against this backdrop, two issues must be examined: firstly, the demographic challenge.
• This is against the backdrop of a suicide bomber in Moscow last week killing six innocent civilians.
• Benefits of free trade have been hailed against the backdrop of increasingly global markets.
• Against this backdrop, we must ask ourselves two questions.
• Against the backdrop of climate change, green vehicles offer an effective way of reducing carbon emissions.
• Global food production will therefore have to increase correspondingly, against a backdrop of pressure on natural resources.
• Against this backdrop, Iran's nuclear activities are further cause for concern.
• Against this backdrop, the balance-sheet on the Palestinian electoral process is in credit.