DULUTH, Ga. (AP) — President Joe Biden took his pitch to Georgia Thursday night for $4 trillion in spending to rebuild the nation's aged infrastructure and vastly expand the federal social safety net, choosing a new political battleground to make his case that Americans want a more activist government.

With his visit to a state he won by fewer than 12,000 votes, Biden set out to build public support for his plan and try to persuade resistant Republicans that his massive proposal is an investment that the country can't afford to pass up.

"We need to invest in things our families care about and...