WASHINGTON (AP) — In a springtime show of unity, congressional Democrats welcomed President Barack Obama to the Capitol Wednesday and unveiled budget blueprints that embrace his key priorities and point the way for major legislation this year on health care, energy and education. Even so, both the House and Senate versions lack specifics for any of the administration’s signature proposals. And Democrats decided to cut spending — and exploding deficits — below levels envisioned in the plan Obama presented less than a month ago.