Fact check: Which cities declared themselves sanctuary cities during Obama's presidency?

1. Summary of the results

During Obama's presidency, over 200 jurisdictions declared themselves as sanctuary cities or limited their cooperation with federal immigration authorities by 2014 ^[1]. Specifically confirmed cities include:

• San Francisco
• Chicago
• Boulder

Additionally, California made history by becoming a sanctuary state through the Trust Act ^[1].

2. Missing context/alternative viewpoints

Several important contextual points need to be considered:

• The surge in sanctuary declarations was specifically in response to the "Secure Communities" (S-Comm) program implemented during Obama's presidency ^[1]
• Not all jurisdictions that limited cooperation with ICE explicitly called themselves "sanctuary cities", making exact counting difficult ^[1]
• The movement of cities challenging federal immigration authorities predated Obama's presidency, with cities like San Francisco and Chicago having challenged federal authorities "for decades" ^[1]

3. Potential misinformation/bias in the original statement

The original question might lead to several misconceptions:

• It suggests that sanctuary city declarations were a direct response to Obama's presidency, when in fact they were specifically responding to the S-Comm program rather than Obama's presidency as a whole ^[1]
• It implies that cities either were or weren't sanctuary cities, when in reality many jurisdictions existed in a grey area - limiting cooperation with federal authorities without formally declaring sanctuary status ^[1]
• The question might suggest this was a new phenomenon, when some cities had been challenging federal immigration authorities long before Obama's presidency ^[1]