They added $858 billion to the debt in 2011 and 2012.
The next largest was the American Recovery and Reinvestment Act. It added $787 billion between 2009 and 2012. It cut taxes, extended unemployment benefits, and funded job-creating public works projects. Like the tax cuts, the ARRA stimulated the economy after the 2008 financial crisis
Obama increased military spending to around $800 billion a year. In fact, his security budget request of $895 billion in FY 2011 set a new record. In FY 2013, he requested $851 billion. That happened even though he withdrew troops from Iraq in 2012 and eliminated the threat from Osama bin Laden in 2011. Obama spent $857 billion in contingency funds during his administration. That was more than the $850 billion Bush devoted to the War on Terror.
What about the Patient Protection and Affordable Care Act? It didn't add anything to the debt in Obama's first term. Most of Obamacare's costs began in 2014 when the health insurance exchanges opened. It also extended coverage to more low-income people that year.
But Obamacare's tax increases offset its costs to the tune of $104 billion between 2010 and 2019.
Congress and Obama also negotiated the sequestration budget cuts. That cut the deficit by a small percent. When all these are added up, Obama's debt contribution was $983 billion between 2009 and 2017.
Now, NOT, do you support the GOP's 180?