Congress is back in session and one of its most important tasks now is to figure out how to pay for President Joe Biden's $3.5 trillion dollar plan to expand the social safety net.Democrats hope to fund it by raising taxes for wealthy corporations and individuals, which Republicans are pushing back on. So how does Congress move forward?Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.