National Headlines 7-12-15

Breakthrough? Iran deal may be imminent (Politico)

Sanders, Dems urge Obama to expand Social Security (The Hill)

Trump hints against a third-party run (The Hill)

GOP strategists to Jeb: Treat Trump with kid gloves (The Hill)

Greek debt crisis: Tsipras resists key bailout measures after 15 hours of talks (Guardian)

Treasury Secretary Encouraged by Reports on Greek Talks (Wall Street Journal)

Walker joining White House race Monday, amid high expectation in already crowded field (FOX News)

Confederate flag supporters rise up to defend embattled symbol (Reuters)

3 Truths About Trump (Atlantic)

Teachers’ union endorses Clinton’s 2016 presidential bid (Associated Press)

Why is the 2016 GOP candidates field so big? (Associated Press)