In wake of confidence vote, it faces shaky political alliances and corruption claims.
Its controversial deal to import US nuclear technology and fuel can now go ahead.
German critics have lambasted the building's design ahead of its festive July 4 inauguration.
Presidential hopeful John McCain visited Colombia on Tuesday and wraps up his three-day trip Thursday in Mexico.
Communists oppose the pact with the US, which would give India access to nuclear fuel and technology, threatening to bring down the government.
Many Democrats are at odds with their own leadership over extending domestic surveillance.
Even in Arizona his rift with the far right is cutting into his 'favorite son' appeal.