BUENOS AIRES (Reuters) -Argentina's lower house of Congress on Tuesday approved a sweeping economic reform plan proposed by President Javier Milei in an overall vote, with lawmakers also giving backing to some key articles of the bill as detailed voting continued. The so-called "omnibus" bill, which libertarian Milei hopes will help attract investments and tamp down inflation in the crisis-hit South American country, will move up the Senate if enough of the articles are individually sanctioned. Milei, a libertarian economist who won a shock election last year pledging to shake up the country, only has a minority in Congress, but has won support from allies in the lower house after months of negotiations and concessions on the reform package, which was rejected at a previous vote in February.