The deadline for cities to submit their proposals is Thursday.
City officials including Mayor Jim Kenney have taken to social media, highlighting the city's positives using the hashtag #Phillydelivers.
On Monday, city officials released a video to show that Philadelphia is a prime location, close to both New York and Washington D.C.
New Jersey Governor Chris Christie is also trying to entice Amazon, offering the company $7-billion in tax incentives.
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